chore: login before each job

Author: sergeysova

.travis.yml

@@ -9,12 +9,14 @@ services:
 env:
   - DOCKER_IMAGE=howtocards/frontend
 
+before_script:
+  - docker login -u $DOCKER_USERNAME -p $DOCKER_PASSWORD
+
 jobs:
   include:
     - stage: build
       script:
         - echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
-        - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
         - docker pull $DOCKER_IMAGE:latest || true
         - docker build -t $DOCKER_IMAGE:$TRAVIS_COMMIT --cache-from $DOCKER_IMAGE:latest .
         - docker images