GH workflow for build and push java docker image (#2)

* change Dockerfile to build .war and add simple build docker workflow

(cherry picked from commit 914a6ac)

.github/workflows/build-and-push-java-docker.yml

@@ -0,0 +1,29 @@
+name: Build Docker
+
+on: [push, pull_request]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      REGISTRY: ghcr.io
+      IMAGENAME: ${{ github.event.repository.name }}
+      TAG: ${{ github.ref_name }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Docker build
+        uses: mr-smithers-excellent/docker-build-push@v6
+        id: build
+        with:
+          directory: java
+          image: ${{ env.IMAGENAME }}
+          dockerfile: java/Dockerfile
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}

java/Dockerfile

@@ -1,15 +1,23 @@
+FROM gradle:jdk17-jammy as builder
+
+WORKDIR /build
+COPY . ./
+RUN gradle wrapper --gradle-version 8.1.1
+RUN ./gradlew build -x test
+
+##########################################################################
 # Use official Tomcat base image
 FROM tomcat:jre17
 
 # Copy WAR file
-COPY app/build/libs/vss-1.0.war /usr/local/tomcat/webapps/vss.war
+COPY --from=builder /build/app/build/libs/vss-1.0.war /usr/local/tomcat/webapps/vss.war
 
 # All the below are defaults.
 # Pass real values as env variables.
-ENV vss.jdbc.url="jdbc:postgresql://postgres:5432/postgres"
-ENV vss.jdbc.username=postgres
-ENV vss.jdbc.password=YOU_MUST_CHANGE_THIS_PASSWORD
-ENV vss.jwt.pubkey="-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq3t7q3HXhyTWS0nWnY+YIYqEwh/Z/Jtwk0DgkqxF455gdzVlSyLyz5NQfXua1jW437/SMEcbHLWcwjxcowj1jvh9blGpvx+xPNH72J5ruDzrh5fhoq2XC7zNt1UVcjkMIlddP4pwK4fV5FrxOWvmxst3Ngp6ShNg5H0yiMTDBF+QqFhRlVqnO4IrIKczxd/VxCXSKJvKjM357n0PVD1KYFT3FJ5fN+d7Fdko16NbfQDDPsfQchfLAF2Tn/r4KZFzCovCQAt7cKDLHl87TvoHVZ4QBGHDIk/w1cig/gERtTqHECVg+wVctWfx6lb+9YG/4/9UgTQpDxAWVaFVd49CwQIDAQAB-----END PUBLIC KEY-----"
+#ENV vss.jdbc.url="jdbc:postgresql://postgres:5432/postgres"
+#ENV vss.jdbc.username=postgres
+#ENV vss.jdbc.password=YOU_MUST_CHANGE_THIS_PASSWORD
+#ENV vss.jwt.pubkey="-----BEGIN PUBLIC KEY-----MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAq3t7q3HXhyTWS0nWnY+YIYqEwh/Z/Jtwk0DgkqxF455gdzVlSyLyz5NQfXua1jW437/SMEcbHLWcwjxcowj1jvh9blGpvx+xPNH72J5ruDzrh5fhoq2XC7zNt1UVcjkMIlddP4pwK4fV5FrxOWvmxst3Ngp6ShNg5H0yiMTDBF+QqFhRlVqnO4IrIKczxd/VxCXSKJvKjM357n0PVD1KYFT3FJ5fN+d7Fdko16NbfQDDPsfQchfLAF2Tn/r4KZFzCovCQAt7cKDLHl87TvoHVZ4QBGHDIk/w1cig/gERtTqHECVg+wVctWfx6lb+9YG/4/9UgTQpDxAWVaFVd49CwQIDAQAB-----END PUBLIC KEY-----"
 
 EXPOSE 8080
 CMD ["catalina.sh", "run"]