added workflow for github actions (#177)

.github/workflows/maven.yml

@@ -0,0 +1,24 @@
+name: Java CI with Maven
+on:
+  push:
+    branches: [ '*' ]
+  pull_request:
+    branches: [ master ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Cache local Maven repository
+      uses: actions/cache@v2
+      with:
+        path: ~/.m2/repository
+        key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
+        restore-keys: |
+          ${{ runner.os }}-maven-
+    - uses: actions/checkout@v2
+    - name: Set up JDK 1.13
+      uses: actions/setup-java@v1
+      with:
+        java-version: 1.13
+    - name: Build with Maven
+      run: mvn clean package -Pprod