add test if container comes up

.gitea/workflows/docker-build.yml

@@ -27,6 +27,18 @@ jobs:
           GIT_REPO: ${{ gitea.repository }}
       - name: docker build
         run: docker build -t $REGISTRY_HOST/$CONTAINER_TAG:$CONTAINER_VERSION .
+      - name: test docker container comes up
+        run: | 
+          docker run --rm -d --name $CONTAINER_NAME -p $TEST_PORT:$TEST_PORT -e ICINGA2_API_USER_ROOT_PASS=$TMP_API_PASS $CONTAINER_TAG:$CONTAINER_VERSION
+          sleep $DEPLOY_TIME
+          curl -k -s -S -i -u root:$TMP_API_PASS "https://localhost:$TEST_PORT/v1"
+        env:
+          DEPLOY_TIME: 15
+          TEST_PORT: 5665
+          TMP_API_PASS: icinga
+      - name: cleanup container
+        if: always()
+        run: docker kill $CONTAINER_NAME
       - name: upload container
         run: | 
           docker login $REGISTRY_HOST -u $REGISTRY_USER -p $REGISTRY_PASS