FROM node:18-alpine as builder WORKDIR /app COPY package*.json ./ RUN npm install COPY . . # Add ARGs for build-time configuration ARG REACT_APP_API_URL ARG REACT_APP_OPERATOR_URL # Build with environment variables RUN npm run build FROM nginx:alpine COPY --from=builder /app/build /usr/share/nginx/html COPY nginx.conf /etc/nginx/conf.d/default.conf # Add runtime environment variable support COPY env.sh /docker-entrypoint.d/ RUN chmod +x /docker-entrypoint.d/env.sh # Default values for runtime ENV REACT_APP_API_URL=http://localhost:3001 ENV REACT_APP_OPERATOR_URL=http://localhost:8080 EXPOSE 80 CMD ["nginx", "-g", "daemon off;"]