chore: debugging heath status of containers and deepstream

.travis.yml

@@ -18,6 +18,7 @@ env:
     - SELENIUM_HUB_IP=172.28.0.2
     - TEST_PAGE_HOST=172.28.0.1 # required for ci:e2e:test-page
     - DEEPSTREAM_HOST=172.28.0.1
+    - STACK_STARTUP_TIMEOUT=30 # in seconds, the time required for deepstream server and selenium grid to go up
 
 before_install:
   - docker network create --subnet=$SELENIUM_NET/16 seleniumnet
@@ -30,6 +31,9 @@ before_install:
   - npm install && npm run tsc && cd ..
   - sudo chmod +x ./deepstream.io/dist/bin/deepstream
   - (./deepstream.io/dist/bin/deepstream start --host $DEEPSTREAM_HOST --http-port 3030 > /dev/null 2>&1) & # providing http port to avoid port conflict with test page (uses 8080)
+  - sleep $STACK_STARTUP_TIMEOUT
+  - wget -O- http://$SELENIUM_HUB_IP:4444
+  - wget -O- http://$DEEPSTREAM_HOST:3030/health-check
 
 script:
   - if [ "$TRAVIS_NODE_VERSION" ~= "8" ]; then