feat: initial build pipeline

Author: devshawn

.github/workflows/gradle.yml

@@ -0,0 +1,24 @@
+name: Java CI
+
+on: [push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up JDK 1.8
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.8
+    
+    - name: Build with Gradle
+      run: ./gradlew build
+
+    - name: Upload build artifact
+      uses: actions/upload-artifact@v1
+      with:
+        name: kafka-dsf.jar
+        path: build/libs/kafka-dsf-all.jar