Add Github Actions builds to create Docker images.

.github/workflows/build.yaml

@@ -26,3 +26,47 @@ jobs:
       run: |
         cd server
         ./mvnw -B verify --file pom.xml
+
+  buildpacks:
+    name: Build Image with Buildpacks
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out sources
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 22
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 22
+          cache: 'maven'
+
+      - name: Build with Maven
+        run: |
+          cd server
+          ./mvnw -Dspring-boot.build-image.publish \
+                 -Dspring-boot.build-image.imageName=ttl.sh/restbucks-${GITHUB_WORKFLOW_SHA}:1d \
+                 -Pbuildpacks
+
+  buildpacks-native:
+    name: Build Native Image with Buildpacks
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out sources
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 22
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 22
+          cache: 'maven'
+
+      - name: Build with Maven
+        run: |
+          cd server
+          ./mvnw -Dspring-boot.build-image.publish=true \
+                 -Dspring-boot.build-image.imageName=ttl.sh/restbucks-native-${GITHUB_WORKFLOW_SHA}:1d
+                 -Pbuildpacks-native