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docker_svc/real-time-chat-app/Dockerfile

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+# Use the official Node.js image as a base
+FROM node:20
+
+# Set the working directory inside the container
+WORKDIR /app
+
+# Install pnpm globally with setup
+ENV PNPM_HOME=/usr/local/bin
+RUN npm install -g pnpm
+
+# Copy package.json and package-lock.json to the working directory
+COPY app/package*.json ./
+
+# Install dependencies using pnpm
+RUN pnpm install
+
+# Set environment variables for the build
+ARG REACT_APP_API_BASE_URL
+ENV REACT_APP_API_BASE_URL=${REACT_APP_API_BASE_URL:-http://rag-service:8000}
+
+# Copy specific folders to avoid node_modules
+COPY app/public ./public
+COPY app/src ./src
+COPY app/*.json ./
+
+# Build the React application with pnpm - show env vars for debugging
+RUN echo "Building with API URL: $REACT_APP_API_BASE_URL" && \
+    pnpm run build
+
+# Use npm for global installs (more reliable in Docker)
+RUN npm install -g serve
+
+# Expose the port the app runs on
+EXPOSE 3000
+
+# Command to run the application
+CMD ["serve", "-s", "build"]