FROM node:12 AS builder MAINTAINER OhMyForm WORKDIR /usr/src/app # just copy everhing COPY . . RUN yarn install --frozen-lockfile RUN yarn build FROM node:12-alpine WORKDIR /usr/src/app COPY --from=builder /usr/src/app /usr/src/app ENV PORT=3000 EXPOSE 3000 CMD [ "yarn", "start:prod" ]