nextjs dockerfile

# This gets our prod dependencies installed and out of the way
FROM node:12-alpine as base
ENV PORT=3000
EXPOSE $PORT
ENV NODE_ENV=production
WORKDIR /app
RUN apk update && apk add --no-cache tini
# Allows us to stop the server with Ctrl + C
ENTRYPOINT ["/sbin/tini", "--"]
COPY package*.json ./
COPY .npmrc ./
RUN npm config list \
    && npm install --only=production --no-optional \
    && npm cache clean --force
COPY ./public ./public
COPY ./tsconfig.json ./
COPY ./next.config.js ./
COPY ./next-env.d.ts ./

FROM base as dev
WORKDIR /app
ENV NODE_ENV=development
RUN npm config list \
    && npm install --only=development --no-optional \
    && npm cache clean --force
COPY ./src ./src
CMD yarn dev -p $PORT

FROM dev as builder
RUN npx next telemetry disable
RUN yarn build

FROM base as prod
COPY --from=builder /app/.next/ ./.next/
COPY --from=builder /app/public/ ./public/
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001
USER nextjs
CMD yarn start -p $PORT