Wait 3 seconds to let server to start

abitrolly · abitrolly · commit 3905047d6275 · 2020-07-29T20:40:18.000+03:00
Because `docker-compose` is not capable of checking open ports docker/compose#374
diff --git a/.travis.yml b/.travis.yml
@@ -9,5 +9,6 @@ before_install:
   - docker images
 
 script:
+  - sleep 3
   - curl http://localhost:8002
   - CHTSH_URL=http://localhost:8002 bash tests/run-tests.sh
