Add Continuous integration (#34)

.github/workflows/continuous-integration.yml

@@ -0,0 +1,26 @@
+# Run continuous integration
+
+on:
+  push:
+    branches:
+      - '*'
+  pull_request:
+    branches:
+      - '*'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Set up Java
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+          check-latest: false
+          cache: 'maven'
+      - name: Build with Maven
+        run: 'mvn package'
+        shell: bash