use multi-stage build

.github/workflows/release.yml

@@ -1,4 +1,4 @@
-name: Production Release
+name: Release
 on:
   push:
     branches:
@@ -44,10 +44,9 @@ jobs:
           java-package: jdk # (jre, jdk, or jdk+fx) - defaults to jdk
           architecture: x64 # (x64 or x86) - defaults to x64
 
-      # Install artifacts locally for the docker build
-      # Also runs unit/integration tests
-      - name: Install artifacts locally
-        run: mvn install
+      # Build with Maven
+      - name: Test
+        run: mvn test
 
 
       # Cache Docker layers

docker/Dockerfile

@@ -1,13 +1,18 @@
 ARG BASE_IMAGE=eclipse-temurin
 ARG JRE_VERSION=17-jdk
 
+
+FROM ${BASE_IMAGE}:${JRE_VERSION} as source
+WORKDIR /build
+COPY . /build/
+RUN ./mvnw clean package -DskipTests
+
 FROM ${BASE_IMAGE}:${JRE_VERSION} as builder
 WORKDIR /build
-COPY webapp/target/*-exec.jar app.jar
+COPY --from=source /build/webapp/target/*-exec.jar app.jar
 RUN java -Djarmode=layertools -jar app.jar extract
 
 FROM ${BASE_IMAGE}:${JRE_VERSION}
-
 USER root
 WORKDIR /app