# First stage: generate the package-lock.json file
FROM node:21 as builder
WORKDIR /app
# Copy package.json to generate package-lock.json
COPY package.json ./
# Run npm install to generate package-lock.json
RUN npm install

# Second stage: use the generated package-lock.json for a clean install
FROM node:21
WORKDIR /app
# Copy package.json and the generated package-lock.json from the builder stage
COPY package.json ./
COPY --from=builder /app/package-lock.json ./
# Use npm ci with the lock file for a reproducible, production install
RUN npm ci --only=production

# Copy the rest of your application code
COPY . .

EXPOSE 7860
CMD ["node", "server.js"]