Added Look4Sat CI workflow

.github/workflows/main.yml

@@ -0,0 +1,54 @@
+name: Look4Sat CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with: {java-version: 1.8}
+
+      - name: Build release APK and AAB after tests
+        id: unit_tests_and_build
+        run: |
+          ./gradlew test
+          ./gradlew assembleRelease --stacktrace
+          ./gradlew bundleRelease
+
+      - uses: r0adkll/sign-android-release@v1
+        id: sign_apk
+        with:
+          releaseDirectory: app/build/outputs/apk/release
+          keyStorePassword: ${{ secrets.KEYSTORE_STORE_PASSWORD }}
+          alias: ${{ secrets.KEYSTORE_KEY_ALIAS }}
+          keyPassword: ${{ secrets.KEYSTORE_KEY_PASSWORD }}
+          signingKeyBase64: ${{ secrets.KEYSTORE_FILE }}
+        env:
+          BUILD_TOOLS_VERSION: "30.0.3"
+
+      - uses: r0adkll/sign-android-release@v1
+        id: sign_aab
+        with:
+          releaseDirectory: app/build/outputs/bundle/release
+          keyStorePassword: ${{ secrets.KEYSTORE_STORE_PASSWORD }}
+          alias: ${{ secrets.KEYSTORE_KEY_ALIAS }}
+          keyPassword: ${{ secrets.KEYSTORE_KEY_PASSWORD }}
+          signingKeyBase64: ${{ secrets.KEYSTORE_FILE }}
+        env:
+          BUILD_TOOLS_VERSION: "30.0.3"
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: Signed apk
+          path: ${{steps.sign_apk.outputs.signedReleaseFile}}
+
+      - uses: actions/upload-artifact@v2
+        with:
+          name: Signed app bundle
+          path: ${{steps.sign_aab.outputs.signedReleaseFile}}