Add workflow to automatically build jars

.github/workflows/jar.yml

@@ -0,0 +1,39 @@
+name: Build Jars
+
+on:
+  release:
+    types:
+      - created
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up JDK 11
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Run build script
+      run: bash buildHeadless.sh
+
+    - name: Upload Release Asset
+      id: upload-release-asset
+      uses: actions/upload-release-asset@v1
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      with:
+        upload_url: ${{ github.event.release.upload_url }}
+        asset_path: StarfishCLI.jar
+        asset_name: StarfishCLI.jar
+        asset_content_type: application/java-archive