chore(gtm): Optimize Docker container with multi-stage build and flat structure

gtm-architect/Dockerfile

@@ -1,28 +1,59 @@
-# Base image for Python
-FROM python:3.10-slim
+# Stage 1: Build the React frontend
+FROM node:20-slim AS frontend-builder
 
-# Set the working directory
 WORKDIR /app
 
-# Copy shared modules first
-COPY helpers.py /app/
-COPY config.py /app/
+# Copy package.json and install dependencies
+# We are inside the build context root, so path is gtm-architect/package.json
+COPY gtm-architect/package.json ./
+RUN npm install
 
-# Copy application-specific files
-COPY gtm_architect_orchestrator.py /app/
-COPY gtm-architect /app/gtm-architect
+# Copy the source code
+COPY gtm-architect/ .
+
+# Build the application
+RUN npm run build
+
+# ---
+
+# Stage 2: Final application image
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install Node.js (minimal runtime)
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends curl ca-certificates && \
+    curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && \
+    apt-get install -y --no-install-recommends nodejs && \
+    rm -rf /var/lib/apt/lists/*
 
 # Install Python dependencies
-RUN pip install --no-cache-dir -r /app/gtm-architect/requirements.txt
+# We use the requirements from the subdirectory
+COPY gtm-architect/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
 
-# Install Node.js and npm
-RUN apt-get update && apt-get install -y nodejs npm && npm cache clean --force
+# Copy the Node.js server script and package.json for runtime deps
+COPY gtm-architect/server.cjs .
+COPY gtm-architect/package.json .
 
-# Install Node.js dependencies for the frontend bridge
-RUN npm install --prefix /app/gtm-architect
+# Install only production Node.js dependencies
+RUN npm install --omit=dev
 
-# Expose the port the app runs on
+# Copy the built frontend from the builder stage
+COPY --from=frontend-builder /app/dist ./dist
+
+# Copy the Python Orchestrator and shared modules
+COPY gtm_architect_orchestrator.py .
+COPY helpers.py .
+COPY config.py .
+COPY market_db_manager.py .
+
+# Copy API Key if available (handled by docker-compose usually, but good for standalone)
+# COPY gemini_api_key.txt .
+
+# Expose port
 EXPOSE 3005
 
-# Command to run the application
-CMD ["node", "/app/gtm-architect/server.cjs"]
+# Start the server
+CMD ["node", "server.cjs"]