Optimize Docker: Switch to multi-stage build for faster and leaner deployment

Dockerfile

@@ -1,44 +1,62 @@
-FROM node:20-bookworm
+# Stage 1: Build the application
+FROM node:20-bookworm AS builder
 
-# Install Python, Java, and Redis
+WORKDIR /app
+
+# Copy root configurations
+COPY package.json package-lock.json ./
+COPY packages/shared/package.json ./packages/shared/
+COPY packages/server/package.json ./packages/server/
+COPY packages/client/package.json ./packages/client/
+
+# Install all dependencies for building
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build all packages (shared -> server -> client)
+RUN npm run build
+
+
+# Stage 2: Runtime environment
+FROM node:20-bookworm-slim
+
+# Install runtime dependencies: Redis, Java (for execution), and Python
 RUN apt-get update && apt-get install -y \
     python3 \
     openjdk-17-jdk \
     redis-server \
     && rm -rf /var/lib/apt/lists/*
 
-# Set working directory
 WORKDIR /app
 
-# Copy root package files
+# Copy production manifests
 COPY package.json package-lock.json ./
-
-# Copy workspace package files
 COPY packages/shared/package.json ./packages/shared/
 COPY packages/server/package.json ./packages/server/
 COPY packages/client/package.json ./packages/client/
 
-# Install dependencies
-RUN npm ci
+# Install only production dependencies
+RUN npm ci --omit=dev
 
-# Copy full source
-COPY . .
+# Copy compiled results from the builder
+COPY --from=builder /app/packages/shared/dist ./packages/shared/dist
+COPY --from=builder /app/packages/server/dist ./packages/server/dist
+COPY --from=builder /app/packages/client/dist ./packages/client/dist
 
-# Build packages
-RUN npm run build
+# Copy startup script
+COPY scripts/start-hf.sh ./scripts/start-hf.sh
+RUN chmod +x ./scripts/start-hf.sh
 
-# Set environment variables for Hugging Face Spaces
+# Environment variables for Hugging Face
 ENV NODE_ENV=production
 ENV PORT=7860
 ENV CLIENT_URL=*
 ENV REDIS_URL=redis://localhost:6379
 
-# Copy startup script
-COPY scripts/start-hf.sh ./scripts/start-hf.sh
-RUN chmod +x ./scripts/start-hf.sh
-
 # Expose the HF port
 EXPOSE 7860
 
-# Start Redis and the server via script
+# Start Redis and the server
 CMD ["./scripts/start-hf.sh"]