Reuse artifact

.github/workflows/build_docker_images.yml

@@ -21,15 +21,15 @@ jobs:
           key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
           restore-keys: ${{ runner.os }}-m2
       - name: Build with maven
-        run: mvn package -DskipTests -Dbuild-version="${SEBSERVER_VERSION}"
-      - run: mkdir staging && cp target/*.jar staging
+        run: mvn package -DskipTests -Dbuild-version="auto"
       - uses: actions/upload-artifact@v2
         with:
           name: Package
-          path: staging
+          path: target/seb-server-.jar
 
   docker_push:
     runs-on: ubuntu-latest
+    needs: build
     steps:
       -
         name: Set up QEMU
@@ -43,6 +43,11 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - 
+        name: Download a single artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: Package
       -
         name: Build and push
         id: docker_build

docker/demo/Dockerfile

@@ -1,21 +1,3 @@
-FROM alpine/git
-
-ARG SEBSERVER_VERSION
-ARG GIT_TAG="v${SEBSERVER_VERSION}"
-
-WORKDIR /sebserver
-RUN if [ "x${GIT_TAG}" = "x" ] ; \
-    then git clone --depth 1 https://github.com/SafeExamBrowser/seb-server.git ; \
-    else git clone -b "$GIT_TAG" --depth 1 https://github.com/SafeExamBrowser/seb-server.git ; fi
-
-FROM maven:latest
-
-ARG SEBSERVER_VERSION
-
-WORKDIR /sebserver
-COPY --from=0 /sebserver/seb-server /sebserver
-RUN mvn clean install -DskipTests -Dbuild-version="${SEBSERVER_VERSION}"
-
 FROM openjdk:11-jre-stretch
 
 ARG SEBSERVER_VERSION
@@ -26,7 +8,7 @@ ENV SERVER_PWD=
 
 
 WORKDIR /sebserver
-COPY --from=1 /sebserver/target/seb-server-"${SEBSERVER_JAR}".jar /sebserver
+COPY --from=1 target/seb-server-auto.jar /sebserver
 
 ENTRYPOINT exec java \
     -Dcom.sun.management.jmxremote \