add maven build action

.gitea/workflows/maven.yml

@@ -0,0 +1,24 @@
+name: Gitea Action Maven build
+
+on:
+  push:
+    branches:['master']
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout the repo
+      - uses: actions/checkout@v4
+      - name: Set up Maven
+        uses: actions/setup-maven@v3
+        with:
+          maven-version: 3.6.3
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v4
+        with:
+          java-version: 1.8
+          distribution: 'oracle'
+          cache: 'maven'
+      - name: Build with Maven
+        run: mvn -B package --file pom.xml