adding gh action maven build

.github/workflows/mvn-build.yml

@@ -0,0 +1,77 @@
+name: Maven Project Build
+
+on: [workflow_dispatch]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    env:
+      SEGMENT_DOWNLOAD_TIMEOUT_MINS: '2'
+    steps:
+      - name: Clone repo
+        uses: actions/checkout@v3
+        with:
+          repository: uniCenta/unicenta-opos
+          token: ${{ secrets.ACCESS_TOKEN }}
+
+      - name: check for files
+        run: ls -ltr
+
+      - name: Check uniCenta maven repo
+        run: curl https://repo.unicenta.org/maven2
+
+      - name: Check IP address
+        run: curl ipinfo.io/ip
+
+      - name: Cache Maven packages
+        uses: actions/cache@v2
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: |
+            ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+            ${{ runner.os }}-m2-
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v3
+        with:
+          java-version: '11'
+          distribution: 'adopt'
+          architecture: x64
+          cache: maven
+
+      - name: Build with Maven
+        run: mvn clean package
+
+      - name: check for jar
+        run: ls -ltr ./target/
+
+      - name: Set version of application
+        run: echo "APP_VERSION=$(unzip -q -c target/unicentaopos.jar META-INF/MANIFEST.MF | grep -oP '(?<=Implementation-Version:\s)[0-9_.-]*')" >> $GITHUB_ENV
+
+      - name: upload build
+        uses: actions/upload-artifact@v2
+        with:
+          name: build
+          path: target
+
+      - name: Build linx deb 64
+        uses: benc-uk/workflow-dispatch@v1.1
+        with:
+          workflow: Linux deb 64bit build
+          token: ${{ secrets.ACCESS_TOKEN }}
+          inputs: '{ "version": "${{ env.APP_VERSION }}"}'
+
+      - name: Build Windows 64
+        uses: benc-uk/workflow-dispatch@v1.1
+        with:
+          workflow: Windows 64bit build
+          token: ${{ secrets.ACCESS_TOKEN }}
+          inputs: '{ "version": "${{ env.APP_VERSION }}"}'
+
+      - name: Build MacOS Intel
+        uses: benc-uk/workflow-dispatch@v1.1
+        with:
+          workflow: MACOS Intel build
+          token: ${{ secrets.ACCESS_TOKEN }}
+          inputs: '{ "version": "${{ env.APP_VERSION }}"}'