Add docker test script

.travis.yml

@@ -18,7 +18,7 @@ before_install:
     - mkdir -p ./data/es_snapshots
     - sudo chown -R 1000:1000 ./data/es*
     - docker build -t vulnwhisperer-local .
-    - docker-compose -f docker-compose-test.yml up
+    - docker-compose -f docker-compose-test.yml up -d
 install:
     - pip install -r requirements.txt
     - pip install flake8  # pytest  # add another testing frameworks later
@@ -48,6 +48,7 @@ script:
     # Test only qualy_vuln
     - rm -rf /tmp/VulnWhisperer
     - vuln_whisperer -c configs/test.ini -s qualys_vuln --mock --mock_dir ${TEST_PATH}; [[ $? -eq 1 ]]
+    - bash tests/test-docker.sh
 notifications:
     on_success: change
     on_failure: change  # `always` will be the setting once code changes slow down