[#1] Add CI build with maven

.github/workflows/build-main.yml

@@ -0,0 +1,34 @@
+name: "build"
+
+on:
+  [ push, pull_request ]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'oracle'
+          java-version: '17'
+      - name: Set up Maven
+        uses: stCarolas/[email protected]
+        with:
+          maven-version: 3.9.6
+      - name: Cache Maven packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 16
+          cache: 'npm'
+      - name: Display date
+        run: date
+      - name: Build with maven
+        run: mvn clean install --show-version --batch-mode --errors --update-snapshots