FROM maven:3.6.3-jdk-11 AS build
WORKDIR /workdir/server
COPY pom.xml /workdir/server/pom.xml
RUN mvn dependency:go-offline

COPY src /workdir/server/src

RUN mvn --batch-mode clean compile assembly:single

FROM openjdk:11-jre-slim
ARG DEPENDENCY=/workdir/server/target
EXPOSE 8080
COPY --from=build ${DEPENDENCY}/app.jar /app.jar
CMD java -jar /app.jar