layered images must not be executable springboot apps

.github/workflows/master-build.yml

@@ -17,6 +17,12 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 17
+      - name: Cache Maven packages
+        uses: actions/cache@v1
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
       - name: Build
         run: >
           ./mvnw clean verify

Dockerfile

@@ -1,4 +1,14 @@
+FROM openjdk:17.0.1-oracle as builder
+WORKDIR application
+ARG JAR_FILE=target/openwms-configuration-exec.jar
+COPY ${JAR_FILE} application.jar
+RUN java -Djarmode=layertools -jar application.jar extract
+
 FROM openjdk:17.0.1-oracle
 ARG JAVA_OPTS="-Xss512k"
-ADD target/openwms-configuration-exec.jar app.jar
-ENTRYPOINT exec java $JAVA_OPTS -jar /app.jar
+WORKDIR application
+COPY --from=builder application/dependencies/ ./
+COPY --from=builder application/spring-boot-loader/ ./
+COPY --from=builder application/snapshot-dependencies/ ./
+COPY --from=builder application/application/ ./
+ENTRYPOINT exec java $JAVA_OPTS org.springframework.boot.loader.JarLauncher

pom.xml

@@ -107,7 +107,6 @@
                     </execution>
                 </executions>
                 <configuration>
-                    <executable>true</executable>
                     <layers>
                         <configuration>${project.basedir}/src/layers.xml</configuration>
                         <enabled>true</enabled>