Add github CI

.github/workflows/gradle.yml

@@ -0,0 +1,43 @@
+# 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://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: Java CI with Gradle
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+      with: 
+        fetch-depth: 0
+    
+    - name: Set up JDK 8
+      uses: actions/setup-java@v2
+      with:
+        java-version: '8'
+        distribution: 'adopt'
+        cache: gradle
+        
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+
+    - name: Setup the workspace
+      run: ./gradlew setupCIWorkspace
+    
+    - name: Build the mod
+      run: ./gradlew build
+        
+    - uses: "marvinpinto/action-automatic-releases@latest"
+      with:
+        repo_token: "${{ secrets.GITHUB_TOKEN }}"
+        automatic_release_tag: "latest"
+        prerelease: true
+        title: "Latest Development Build"
+        files: build/libs/*.jar
+