planetwars.dev/examples/java/Dockerfile

FROM alpine:latest as builder
RUN sed -i s/v3.18/edge/ /etc/apk/repositories

RUN apk upgrade --no-cache
RUN apk --no-cache add openjdk20

WORKDIR /workdir
COPY . .

RUN javac -cp .:lib/gson-2.10.1.jar ./planetwars/*.java Example.java

FROM alpine:latest
RUN sed -i s/v3.18/edge/ /etc/apk/repositories

RUN apk --no-cache add openjdk20-jre
RUN apk upgrade --no-cache

WORKDIR /workdir

COPY --from=builder /workdir /workdir

CMD java -cp .:lib/gson-2.10.1.jar Example