Dockerfile

FROM node:20-alpine AS base

# Install dependencies only when needed
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Install dependencies based on the preferred package manager
COPY package.json yarn.lock* ./
RUN --mount=type=cache,target=/usr/local/share/.cache/yarn \
    yarn --frozen-lockfile

# Generate Prisma client
COPY prisma ./prisma
COPY prisma.config.ts ./
RUN yarn prisma generate

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY --from=deps /app/prisma ./prisma
COPY --from=deps /app/app/generated/prisma ./app/generated/prisma
COPY . .

ENV NEXT_TELEMETRY_DISABLED=1
ENV DOCKER_BUILD=1
ENV BETTER_AUTH_SECRET="build-time-placeholder-must-be-32-chars-long"

RUN yarn run build

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

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV HOSTNAME="0.0.0.0"

RUN apk add --no-cache wget curl

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

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

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

# Copy Prisma schema, config, generated client, and all node_modules for migrations
COPY --from=deps /app/prisma ./prisma
COPY --from=deps /app/prisma.config.ts ./
COPY --from=deps /app/app/generated/prisma ./app/generated/prisma
COPY --from=deps /app/node_modules ./node_modules

USER nextjs

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=10 \
  CMD curl -s -o /dev/null -w "%{http_code}" http://localhost:3000/ | grep -qE "^(200|401)$" || exit 1

CMD ["sh", "-c", "npx prisma migrate deploy && node server.js"]