play-nine/dockerfile

# build environment
FROM node:12 as builder
WORKDIR /app

COPY package*.json ./
RUN npm install

COPY . ./
RUN npm run build

# production environment
FROM node:12

RUN printf '\n\n- Copy application files\n'
RUN printf 'Subfolder: ${PUBLIC_URL}'
COPY --from=builder /app/build ./application/play-nine
COPY --from=builder /app/build/index.html ./application/

RUN npm install -g serve@11.3.0
EXPOSE 80
CMD ["sh","-c","serve -s application -p 80"]