Dockerfile

# Use official Node.js LTS image
FROM node:20-slim

# Set working directory
WORKDIR /usr/src/app

# Copy package files and install dependencies
COPY package*.json ./
RUN npm install --force

# Install nodemon globally for hot-reloading
RUN npm install -g nodemon

# Install protobufjs CLI for code generation
RUN npm install --save-dev protobufjs-cli

# Copy proto files for code generation
COPY proto/ ./proto/

# Generate protobuf JS and TS files at build time
RUN npm run proto:all

# Don't copy source code here - it will be mounted as a volume
# COPY . .

# Expose port
EXPOSE 3000

# Use environment variables for configuration
ENV NODE_ENV=development

# Start the app with nodemon for real-time reloads
CMD ["npm", "run", "dev"]

# Add Docker healthcheck
HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD wget --no-verbose --tries=1 --spider http://localhost:3000/healthz || exit 1