Add configurable OpenSearch feature and UI improvements

- Add MIT license with Austin Godber copyright
  - Implement optional OpenSearch feature toggle via EMBEDDINGBUDDY_OPENSEARCH_ENABLED
  - Disable OpenSearch by default in production for security
  - Add development environment flag to test OpenSearch disable state
  - Update about modal to open by default with improved content
  - Reorganize text input component: move model selection below text input
  - Conditionally show/hide OpenSearch tab and callbacks based on configuration
  - Update tooltips to reflect OpenSearch availability status

Dockerfile

@@ -2,6 +2,9 @@
 # Stage 1: Builder
 FROM python:3.11-slim as builder
 
+# Create non-root user early in builder stage
+RUN groupadd -r appuser && useradd -r -g appuser appuser
+
 # Install system dependencies for building Python packages
 RUN apt-get update && apt-get install -y \
     build-essential \
@@ -25,6 +28,15 @@ COPY wsgi.py .
 COPY run_prod.py .
 COPY assets/ assets/
 
+# Change ownership of source files before building (lighter I/O)
+RUN chown -R appuser:appuser /app
+
+# Create and set permissions for appuser home directory (needed for uv cache)
+RUN mkdir -p /home/appuser && chown -R appuser:appuser /home/appuser
+
+# Switch to non-root user before building
+USER appuser
+
 # Create virtual environment and install dependencies (including production extras)
 RUN uv venv .venv
 RUN uv sync --frozen --extra prod 
@@ -32,23 +44,28 @@ RUN uv sync --frozen --extra prod
 # Stage 2: Runtime
 FROM python:3.11-slim as runtime
 
+# Create non-root user in runtime stage
+RUN groupadd -r appuser && useradd -r -g appuser appuser
+
 # Install runtime dependencies for compiled packages
 RUN apt-get update && apt-get install -y \
     libgomp1 \
     && rm -rf /var/lib/apt/lists/*
 
-# Set working directory
+# Set working directory and change ownership (small directory)
 WORKDIR /app
+RUN chown appuser:appuser /app
 
-# Copy virtual environment from builder stage
-COPY --from=builder /app/.venv /app/.venv
+# Copy files from builder with correct ownership
+COPY --from=builder --chown=appuser:appuser /app/.venv /app/.venv
+COPY --from=builder --chown=appuser:appuser /app/src /app/src
+COPY --from=builder --chown=appuser:appuser /app/main.py /app/main.py
+COPY --from=builder --chown=appuser:appuser /app/assets /app/assets
+COPY --from=builder --chown=appuser:appuser /app/wsgi.py /app/wsgi.py
+COPY --from=builder --chown=appuser:appuser /app/run_prod.py /app/run_prod.py
 
-# Copy application files from builder stage
-COPY --from=builder /app/src /app/src
-COPY --from=builder /app/main.py /app/main.py
-COPY --from=builder /app/assets /app/assets
-COPY --from=builder /app/wsgi.py /app/wsgi.py
-COPY --from=builder /app/run_prod.py /app/run_prod.py
+# Switch to non-root user
+USER appuser
 
 # Make sure the virtual environment is in PATH
 ENV PATH="/app/.venv/bin:$PATH"
@@ -65,11 +82,6 @@ ENV EMBEDDINGBUDDY_ENV=production
 # Expose port
 EXPOSE 8050
 
-# Create non-root user
-RUN groupadd -r appuser && useradd -r -g appuser appuser
-RUN chown -R appuser:appuser /app
-USER appuser
-
 # Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
     CMD python -c "import requests; requests.get('http://localhost:8050/', timeout=5)" || exit 1

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Austin Godber - EmbeddingBuddy
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "embeddingbuddy"
-version = "0.5.0"
+version = "0.6.0"
 description = "A Python Dash application for interactive exploration and visualization of embedding vectors through dimensionality reduction techniques."
 readme = "README.md"
 requires-python = ">=3.11"

run_dev.py

@@ -12,9 +12,15 @@ def main():
     os.environ["EMBEDDINGBUDDY_ENV"] = "development"
     os.environ["EMBEDDINGBUDDY_DEBUG"] = "true"
 
+    # Check for OpenSearch disable flag (optional for testing)
+    # Set EMBEDDINGBUDDY_OPENSEARCH_ENABLED=false to test without OpenSearch
+    opensearch_status = os.getenv("EMBEDDINGBUDDY_OPENSEARCH_ENABLED", "true")
+    opensearch_enabled = opensearch_status.lower() == "true"
+    
     print("🚀 Starting EmbeddingBuddy in development mode...")
     print("📁 Auto-reload enabled - changes will trigger restart")
     print("🌐 Server will be available at http://127.0.0.1:8050")
+    print(f"🔍 OpenSearch: {'Enabled' if opensearch_enabled else 'Disabled'}")
     print("⏹️  Press Ctrl+C to stop")
     
     app = create_app()

run_prod.py

@@ -13,6 +13,9 @@ def main():
     # Force production settings
     os.environ["EMBEDDINGBUDDY_ENV"] = "production"
     os.environ["EMBEDDINGBUDDY_DEBUG"] = "false"
+    # Disable OpenSearch by default in production (can be overridden by setting env var)
+    if "EMBEDDINGBUDDY_OPENSEARCH_ENABLED" not in os.environ:
+        os.environ["EMBEDDINGBUDDY_OPENSEARCH_ENABLED"] = "false"
     
     print("🚀 Starting EmbeddingBuddy in production mode...")
     print(f"⚙️  Workers: {AppSettings.GUNICORN_WORKERS}")

src/embeddingbuddy/app.py

@@ -16,11 +16,33 @@ def create_app():
 
     app = dash.Dash(
         __name__,
+        title="EmbeddingBuddy",
         external_stylesheets=[
             dbc.themes.BOOTSTRAP,
             "https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css",
         ],
         assets_folder=assets_path,
+        meta_tags=[
+            {
+                "name": "description",
+                "content": "Interactive embedding visualization tool for exploring high-dimensional vectors through dimensionality reduction techniques like PCA, t-SNE, and UMAP.",
+            },
+            {"name": "author", "content": "EmbeddingBuddy"},
+            {
+                "name": "keywords",
+                "content": "embeddings, visualization, dimensionality reduction, PCA, t-SNE, UMAP, machine learning, data science",
+            },
+            {"name": "viewport", "content": "width=device-width, initial-scale=1.0"},
+            {
+                "property": "og:title",
+                "content": "EmbeddingBuddy - Interactive Embedding Visualization",
+            },
+            {
+                "property": "og:description",
+                "content": "Explore and visualize embedding vectors through interactive 2D/3D plots with multiple dimensionality reduction techniques.",
+            },
+            {"property": "og:type", "content": "website"},
+        ],
     )
 
     # Allow callbacks to components that are dynamically created in tabs

src/embeddingbuddy/config/settings.py

@@ -85,6 +85,9 @@ class AppSettings:
     GUNICORN_KEEPALIVE = int(os.getenv("GUNICORN_KEEPALIVE", "5"))
 
     # OpenSearch Configuration
+    OPENSEARCH_ENABLED = (
+        os.getenv("EMBEDDINGBUDDY_OPENSEARCH_ENABLED", "True").lower() == "true"
+    )
     OPENSEARCH_DEFAULT_SIZE = 100
     OPENSEARCH_SAMPLE_SIZE = 5
     OPENSEARCH_CONNECTION_TIMEOUT = 30

src/embeddingbuddy/ui/callbacks/data_processing.py

@@ -82,19 +82,23 @@ class DataProcessingCallbacks:
         )
         def render_tab_content(active_tab):
             from ...ui.components.datasource import DataSourceComponent
+            from ...config.settings import AppSettings
 
             datasource = DataSourceComponent()
 
-            if active_tab == "opensearch-tab":
+            if active_tab == "opensearch-tab" and AppSettings.OPENSEARCH_ENABLED:
                 return [datasource.create_opensearch_tab()]
             elif active_tab == "text-input-tab":
                 return [datasource.create_text_input_tab()]
             else:
                 return [datasource.create_file_upload_tab()]
 
-        # Register callbacks for both data and prompts sections
-        self._register_opensearch_callbacks("data", self.opensearch_client_data)
-        self._register_opensearch_callbacks("prompts", self.opensearch_client_prompts)
+        # Register callbacks for both data and prompts sections (only if OpenSearch is enabled)
+        if AppSettings.OPENSEARCH_ENABLED:
+            self._register_opensearch_callbacks("data", self.opensearch_client_data)
+            self._register_opensearch_callbacks(
+                "prompts", self.opensearch_client_prompts
+            )
 
         # Register collapsible section callbacks
         self._register_collapse_callbacks()

src/embeddingbuddy/ui/callbacks/interactions.py

@@ -7,6 +7,16 @@ class InteractionCallbacks:
         self._register_callbacks()
 
     def _register_callbacks(self):
+        @callback(
+            Output("about-modal", "is_open"),
+            [Input("about-button", "n_clicks"), Input("about-modal-close", "n_clicks")],
+            prevent_initial_call=True,
+        )
+        def toggle_about_modal(about_clicks, close_clicks):
+            if about_clicks or close_clicks:
+                return True if about_clicks else False
+            return False
+
         @callback(
             [
                 Output("processed-data", "data", allow_duplicate=True),

src/embeddingbuddy/ui/components/about.py

@@ -0,0 +1,90 @@
+from dash import html, dcc
+import dash_bootstrap_components as dbc
+
+
+class AboutComponent:
+    def _get_about_content(self):
+        return """
+# 🔍 Interactive Embedding Vector Visualization
+
+EmbeddingBuddy is a web application for interactive exploration and
+visualization of embedding vectors through dimensionality reduction techniques
+(PCA, t-SNE, UMAP).
+
+You have two ways to get started:
+
+1. Generate embeddings directly in the browser if it supports WebGPU.
+2. Upload your NDJSON file containing embedding vectors and metadata.
+
+## Generating Embeddings in Browser
+
+1. Expand the "Generate Embeddings" section.
+2. Input your text data (one entry per line).
+    1. Optionally you can use the built in sample data by clicking "Load Sample Data" button.
+3. Click "Generate Embeddings" to create vectors using a pre-trained model.
+
+## NDJSON File Format
+
+```json
+{"id": "doc_001", "embedding": [0.1, -0.3, 0.7, ...], "text": "Sample text content", "category": "news", "subcategory": "politics", "tags": ["election", "politics"]}
+{"id": "doc_002", "embedding": [0.2, -0.1, 0.9, ...], "text": "Another example", "category": "review", "subcategory": "product", "tags": ["tech", "gadget"]}
+```
+
+
+## ✨ Features
+
+- Drag-and-drop NDJSON file upload
+- Multiple dimensionality reduction algorithms
+- 2D/3D interactive plots with Plotly
+- Color coding by categories, subcategories, or tags
+- In-browser embedding generation
+- OpenSearch integration for data loading
+
+## 🔧 Supported Algorithms
+
+- **PCA** (Principal Component Analysis)
+- **t-SNE** (t-Distributed Stochastic Neighbor Embedding)
+- **UMAP** (Uniform Manifold Approximation and Projection)
+
+---
+
+📂 [View on GitHub](https://github.com/godber/EmbeddingBuddy)
+
+*Built with: Python, Dash, Plotly, scikit-learn, OpenTSNE, UMAP*
+        """.strip()
+
+    def create_about_modal(self):
+        return dbc.Modal(
+            [
+                dbc.ModalHeader(
+                    dbc.ModalTitle("Welcome to EmbeddingBuddy"),
+                    close_button=True,
+                ),
+                dbc.ModalBody(
+                    [dcc.Markdown(self._get_about_content(), className="mb-0")]
+                ),
+                dbc.ModalFooter(
+                    [
+                        dbc.Button(
+                            "Close",
+                            id="about-modal-close",
+                            color="secondary",
+                            n_clicks=0,
+                        )
+                    ]
+                ),
+            ],
+            id="about-modal",
+            is_open=True,
+            size="lg",
+        )
+
+    def create_about_button(self):
+        return dbc.Button(
+            [html.I(className="fas fa-info-circle me-2"), "About"],
+            id="about-button",
+            color="outline-info",
+            size="sm",
+            n_clicks=0,
+            className="ms-2",
+        )

src/embeddingbuddy/ui/components/datasource.py

@@ -1,6 +1,7 @@
 from dash import dcc, html
 import dash_bootstrap_components as dbc
 from .upload import UploadComponent
+from embeddingbuddy.config.settings import AppSettings
 
 
 class DataSourceComponent:
@@ -9,15 +10,18 @@ class DataSourceComponent:
 
     def create_tabbed_interface(self):
         """Create tabbed interface for different data sources."""
+        tabs = [dbc.Tab(label="File Upload", tab_id="file-tab")]
+
+        # Only add OpenSearch tab if enabled
+        if AppSettings.OPENSEARCH_ENABLED:
+            tabs.append(dbc.Tab(label="OpenSearch", tab_id="opensearch-tab"))
+
         return dbc.Card(
             [
                 dbc.CardHeader(
                     [
                         dbc.Tabs(
-                            [
-                                dbc.Tab(label="File Upload", tab_id="file-tab"),
-                                dbc.Tab(label="OpenSearch", tab_id="opensearch-tab"),
-                            ],
+                            tabs,
                             id="data-source-tabs",
                             active_tab="file-tab",
                         )

src/embeddingbuddy/ui/components/sidebar.py

@@ -3,6 +3,7 @@ import dash_bootstrap_components as dbc
 from .upload import UploadComponent
 from .datasource import DataSourceComponent
 from .textinput import TextInputComponent
+from embeddingbuddy.config.settings import AppSettings
 
 
 class SidebarComponent:
@@ -102,6 +103,10 @@ class SidebarComponent:
         )
 
     def _create_data_sources_item(self):
+        tooltip_text = "Load existing embeddings: upload files"
+        if AppSettings.OPENSEARCH_ENABLED:
+            tooltip_text += " or read from OpenSearch"
+
         return dbc.AccordionItem(
             [
                 self.datasource_component.create_error_alert(),
@@ -115,7 +120,7 @@ class SidebarComponent:
                         className="fas fa-info-circle text-muted",
                         style={"cursor": "pointer"},
                         id="load-embeddings-info-icon",
-                        title="Load existing embeddings: upload files or read from OpenSearch",
+                        title=tooltip_text,
                     ),
                 ]
             ),

src/embeddingbuddy/ui/components/textinput.py

@@ -16,14 +16,14 @@ class TextInputComponent:
         """Create the complete text input interface with model selection and processing options."""
         return html.Div(
             [
-                # Model selection section
-                self._create_model_selection(),
-                html.Hr(),
                 # Text input section
                 self._create_text_input_area(),
                 # Text action buttons
                 self._create_text_action_buttons(),
                 html.Hr(),
+                # Model selection section
+                self._create_model_selection(),
+                html.Hr(),
                 # Processing options
                 self._create_processing_options(),
                 html.Hr(),

src/embeddingbuddy/ui/layout.py

@@ -1,16 +1,19 @@
 from dash import dcc, html
 import dash_bootstrap_components as dbc
 from .components.sidebar import SidebarComponent
+from .components.about import AboutComponent
 
 
 class AppLayout:
     def __init__(self):
         self.sidebar = SidebarComponent()
+        self.about = AboutComponent()
 
     def create_layout(self):
         return dbc.Container(
             [self._create_header(), self._create_main_content()]
-            + self._create_stores(),
+            + self._create_stores()
+            + [self.about.create_about_modal()],
             fluid=True,
         )
 
@@ -19,7 +22,19 @@ class AppLayout:
             [
                 dbc.Col(
                     [
-                        html.H1("EmbeddingBuddy", className="text-center mb-4"),
+                        html.Div(
+                            [
+                                html.H1(
+                                    "EmbeddingBuddy",
+                                    className="text-center mb-4 d-inline",
+                                ),
+                                html.Div(
+                                    [self.about.create_about_button()],
+                                    className="float-end",
+                                ),
+                            ],
+                            className="d-flex justify-content-between align-items-center",
+                        ),
                         # Load Transformers.js from CDN
                         html.Script(
                             """

uv.lock

@@ -412,7 +412,7 @@ wheels = [
 
 [[package]]
 name = "embeddingbuddy"
-version = "0.5.0"
+version = "0.5.1"
 source = { editable = "." }
 dependencies = [
     { name = "dash" },