Added git workflow for automatic release process.

Author: mnordahl

.github/workflows/release.yml

@@ -0,0 +1,52 @@
+name: Build and Release Java Application
+
+on:
+  push:
+    tags:
+      - "release_*" # Trigger on tags with prefix release_
+
+jobs:
+  build_and_release:
+    runs-on: ubuntu-latest # Specifies the runner environment
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3 # Checks out the repository code under $GITHUB_WORKSPACE
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v3
+        with:
+          java-version: "17"
+          distribution: "temurin" # AdoptOpenJDK builds from Eclipse Foundation
+
+      - name: Build with Gradle
+        run: ./gradlew build
+
+      - name: Rename JAR File
+        run: |
+          TAG_NAME=${GITHUB_REF#refs/tags/release_}
+          JAR_NAME=c3pu-$TAG_NAME.jar
+          mv build/libs/c3pu-*.jar build/libs/$JAR_NAME
+        env:
+          GITHUB_REF: ${{ github.ref }}
+
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ env.TAG_NAME }}
+          draft: false
+          prerelease: false
+
+      - name: Upload Release Asset
+        uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./build/libs/$JAR_NAME
+          asset_name: $JAR_NAME
+          asset_content_type: application/java-archive