Dockerfile

FROM node:21-alpine AS base

######################################################################################
# 1. Install dependencies only when needed
FROM base AS deps

# Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.
RUN apk add --no-cache libc6-compat

WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json package-lock.json* ./
RUN npm ci

######################################################################################
# 2. Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY public ./public
COPY views ./views
COPY index.ts package-lock.json package.json tsconfig.json ./
RUN npm run build

######################################################################################
# 3. Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup -g 1001 -S nodejs
RUN adduser -S nodejs -u 1001

COPY --from=deps --chown=nodejs:nodejs /app/node_modules ./node_modules
COPY --from=builder --chown=nodejs:nodejs /app/public ./public
COPY --from=builder --chown=nodejs:nodejs /app/views ./views
COPY --from=builder --chown=nodejs:nodejs /app/index.js ./

USER nodejs

EXPOSE 3002

ENV PORT 3002

CMD ["node", "index.js"]