Dockerfile

FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
# Cache busting - this line changes with each build
ARG CACHEBUST=1
RUN echo "Cache bust: $CACHEBUST"

RUN apk add --no-cache libc6-compat
WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* .npmrc* ./
RUN \
  if [ -f yarn.lock ]; then yarn --frozen-lockfile; \
  elif [ -f package-lock.json ]; then npm ci; \
  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm i --frozen-lockfile; \
  else echo "Lockfile not found." && exit 1; \
  fi

# Rebuild the source code only when needed
FROM base AS builder
# Cache busting for builder stage
ARG CACHEBUST=1
RUN echo "Builder cache bust: $CACHEBUST"

WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN --mount=type=secret,id=.env \
  set -a; . /run/secrets/.env; set +a; \
  if [ -f yarn.lock ]; then yarn run build; \
  elif [ -f package-lock.json ]; then npm run build; \
  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm run build; \
  else echo "Lockfile not found." && exit 1; \
  fi

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

# Install curl for health checks
RUN apk add --no-cache curl

COPY --from=builder /app/public ./public

# Automatically leverage output traces to reduce image size
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

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