Maintain actions (#71)

.github/workflows/ci.yaml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request: {}
+  schedule: [cron: 0 0 * * 1-5]
+
+jobs:
+
+  yaml:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: ibiqlik/action-yamllint@v3
+        with:
+          format: colored
+          strict: true
+
+  markdown:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: avto-dev/markdown-lint@v1
+        with:
+          args: /github/workspace
+
+  codeql:
+    runs-on: ubuntu-latest
+    permissions:
+      security-events: write
+      actions: read
+      contents: read
+    steps:
+      - uses: actions/checkout@v3
+      - uses: github/codeql-action/init@v2
+        with:
+          languages: java
+      - uses: github/codeql-action/autobuild@v2
+      - uses: github/codeql-action/analyze@v2
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 11
+          cache: maven
+          server-id: sonatype-nexus
+          server-username: SERVER_USERNAME
+          server-password: SERVER_PASSWORD
+      - run: mvn -B -ntp dependency:go-offline
+      - run: mvn -B -ntp verify
+        if: ${{ github.ref != 'refs/heads/main' }}
+      - run: mvn -B -ntp deploy
+        if: ${{ github.ref == 'refs/heads/main' }}
+        env:
+          SERVER_USERNAME: ${{ secrets.SONATYPE_NEXUS_USERNAME }}
+          SERVER_PASSWORD: ${{ secrets.SONATYPE_NEXUS_PASSWORD }}