Add snapshot Github Action

.github/workflows/snapshot.yml

@@ -0,0 +1,48 @@
+# This workflow will build a Java project with Gradle and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-gradle
+
+name: Gradle CI
+
+on:
+  push:
+    branches: [ "main" ]
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Set up JDK 11
+      uses: actions/setup-java@v3
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+    - id: check
+      name: Build with Gradle
+      uses: gradle/gradle-build-action@v2.6.0
+      with:
+        arguments: check jacocoTestReport jacocoTestCoverageVerification coveralls
+      env:
+        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+    - id: install-gradle-properties
+      name: Install Gradle Properties from Secret
+      if: matrix.os == 'ubuntu-latest'
+      env:
+        GRADLE_PROPERTIES: ${{ secrets.GRADLE_PROPERTIES }}
+        shell: bash
+      run: |
+        mkdir -p ~/.gradle/
+        echo "GRADLE_USER_HOME=${HOME}/.gradle" >> $GITHUB_ENV
+        echo "${GRADLE_PROPERTIES}" > ~/.gradle/gradle.properties
+    - name: Publish to GitHub Packages
+      if: matrix.os == 'ubuntu-latest'
+      uses: gradle/gradle-build-action@bd5760595778326ba7f1441bcf7e88b49de61a25 # v2.6.0
+      with:
+        arguments: :encoder-java:publish :fpng-java:publish  :fpnge-java:publish
+      env:
+        USERNAME: ${{ github.actor }}
+        TOKEN: ${{ secrets.GITHUB_TOKEN }}