Dockerfile

# Install dependencies only when needed
FROM node:18.10-alpine AS deps

LABEL org.opencontainers.image.title = "CMNW-NEXT"
LABEL org.opencontainers.image.vendor = "AlexZeDim"
LABEL org.opencontainers.image.url = "https://i.imgur.com/CY0Kqy3.png"
LABEL org.opencontainers.image.source = "https://github.com/AlexZeDim/cmnw-next"

WORKDIR /opt/app

COPY package.json ./

RUN yarn install --frozen-lockfile

# Rebuild the source code only when needed
# This is where because may be the case that you would try
# to build the app based on some `X_TAG` in my case (Git commit hash)
# but the code hasn't changed.

FROM node:18.10-alpine AS builder

ENV NODE_ENV=production
WORKDIR /opt/app
COPY . .
COPY --from=deps /opt/app/node_modules ./node_modules
RUN yarn build

# Production image, copy all the files and run next
FROM node:14-alpine AS runner

ARG X_TAG
WORKDIR /opt/app
ENV NODE_ENV=production
COPY --from=builder /opt/app/next.config.js ./
COPY --from=builder /opt/app/public ./public
COPY --from=builder /opt/app/.next ./.next
COPY --from=builder /opt/app/node_modules ./node_modules

EXPOSE 3000
CMD ["node_modules/.bin/next", "start"]