mentorenwahl/docker/backend/Dockerfile

FROM crystallang/crystal:latest-alpine as deps
WORKDIR /app
RUN apk add curl --no-cache
COPY ./shard.yml ./shard.lock ./
RUN shards install --production

FROM crystallang/crystal:latest-alpine as builder
ARG BUILD_ENV
WORKDIR /app
COPY --from=deps /app/shard.yml /app/shard.lock ./
COPY --from=deps /app/lib ./lib
COPY ./src ./src
RUN if [ "${BUILD_ENV}" = "development" ]; then \
  time shards build --static --verbose -s -p -t; \
  else \
  time shards build --static --release --no-debug --verbose -s -p -t; \
  fi

FROM ubuntu:latest as user
RUN useradd -u 10001 backend

FROM alpine as runner
WORKDIR /app
COPY --from=user /etc/passwd /etc/passwd
COPY --from=builder /app/bin ./bin
COPY ./db ./db
USER backend
EXPOSE 80
ENTRYPOINT [ "./bin/backend" ]
CMD [ "run" ]