my-portfolio/Dockerfile

FROM node:18-alpine AS builder
RUN mkdir /app
WORKDIR /app

COPY . /app

RUN cd /app && yarn install && yarn build

FROM node:18-alpine

RUN mkdir /app

COPY --from=builder /app/build /app/build
COPY --from=builder /app/package.json /app/yarn.lock /app/

RUN cd /app && \
  yarn install --production &&\
  yarn cache clean

WORKDIR /app

CMD ["node", "build/index.js"]