refactor: use global variables for .env

Author: Mateu Aguiló Bosch

.travis.yml

@@ -28,6 +28,8 @@ env:
     - PROJECT_NAME=contentacms
     - PROJECT_BASE_PATH=$HOME/$PROJECT_NAME
     - PROJECT_RELEASE_BRANCH=${PROJECT_RELEASE_BRANCH:-8.x-1.x}
+    - WEB_HOST=127.0.0.1
+    - WEB_PORT=8888
 
 branches:
   only:
@@ -49,7 +51,7 @@ install:
 before_script:
   # Start Contenta Local Server
   - composer run-script start-contenta $PROJECT_BASE_PATH --timeout=0 &> /dev/null &
-  - until curl -s http://127.0.0.1:8888; do true; done > /dev/null
+  - until curl -s $WEB_HOST:$WEB_PORT; do sleep 1; done > /dev/null
 
 script:
   - composer run-script ci:helper run_functional_tests "$PROJECT_BASE_PATH" --timeout=0