Create build.yml

Automatically build project on every push, pull request, and on demand and uploads build artifacts.

Signed-off-by: Luke Simmons <luke5083@live.com>

.github/workflows/build.yml

@@ -0,0 +1,33 @@
+name: Build
+
+on:
+  push:
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  Build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Repository
+      uses: actions/checkout@v2
+
+    - name: Set-up JDK 8
+      uses: actions/setup-java@v2
+      with:
+        java-version: '8'
+        distribution: 'adopt'
+
+    - name: Grant Execute Permission for gradlew
+      run: chmod +x gradlew
+
+    - name: Build with Gradle
+      run: ./gradlew build -x lint
+
+    - name: Upload apk
+      uses: actions/upload-artifact@v2
+      with:
+        name: Infinity-${{github.sha}}
+        path: app/build/outputs/apk/
+        if-no-files-found: error