container build and publish WIP

.github/Dockerfile_PreBuild

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+FROM jetty:9.4-jre11-slim
+
+# Copy OBP source code
+# Copy build artifact (.war file) into jetty from 'maven' stage.
+COPY /target/API_Explorer-1.0.war /var/lib/jetty/webapps/ROOT.war

.github/workflows/build_package.yml

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+name: build and publish container
+
+on: [push]
+env:
+  ## Sets environment variable
+  DOCKER_HUB_ORGANIZATION: openbankproject
+  DOCKER_HUB_REPOSITORY: api-explorer
+
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          java-version: '11'
+          distribution: 'adopt'
+          cache: maven
+      - name: Build with Maven
+        run: |
+          MAVEN_OPTS="-Xmx3G -Xss2m" mvn package
+      - name: Build the Docker image
+        run: |
+          echo "${{ secrets.DOCKER_HUB_TOKEN }}" | docker login -u "${{ secrets.DOCKER_HUB_USERNAME }}" --password-stdin docker.io
+          docker build . --file .github/Dockerfile_PreBuild --tag docker.io/${{ env.DOCKER_HUB_ORGANIZATION }}/${{ env.DOCKER_HUB_REPOSITORY }}:$GITHUB_SHA --tag docker.io/${{ env.DOCKER_HUB_ORGANIZATION }}/${{ env.DOCKER_HUB_REPOSITORY }}:latest --tag docker.io/${{ env.DOCKER_HUB_ORGANIZATION }}/${{ env.DOCKER_HUB_REPOSITORY }}:develop
+          docker push docker.io/${{ env.DOCKER_HUB_ORGANIZATION }}/${{ env.DOCKER_HUB_REPOSITORY }} --all-tags
+          echo docker done
+
+
+
+