Adding github actions build script.

.github/workflows/master.yml

@@ -0,0 +1,48 @@
+name: Main
+
+on:
+  push:
+    paths-ignore:
+    - '*.md'
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Build Docker image
+        id: build
+        run: docker build . -t dvfdocker/owlcms4:latest
+        shell: bash
+      - run: docker save dvfdocker/owlcms4:latest -o owlcms4.tar
+      - uses: actions/upload-artifact@v3
+        with:
+          name: owlcms4
+          path: owlcms4.tar
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-java@v4
+        with:
+          java-version: '17'
+          distribution: 'temurin'
+      - name: Go offline using the pom.xml
+        run: mvn dependency:go-offline package -P production -am -pl owlcms -Dmaven.test.skip=true
+      - name: Run tests
+        run: mvn clean test -pl owlcms
+  deploy:
+    runs-on: ubuntu-latest
+    needs: [test, build]
+    steps:
+    - uses: actions/download-artifact@v3
+      with:
+        name: owlcms4
+    - run: docker load -i owlcms4.tar
+    - name: Login to DockerHub
+      uses: docker/login-action@v2
+      with:
+        username: ${{ secrets.DOCKERHUB_USERNAME }}
+        password: ${{ secrets.DOCKERHUB_TOKEN }}
+    - name: Push the tagged Docker image
+      run: docker push dvfdocker/owlcms4:latest