Showing docker version

Author: bkuhl

.travis.yml

@@ -1,8 +1,9 @@
 services: docker
 before_install:
+  - docker -v
   # set env vars in the build settings to interact with repositories
   # see https://docs.travis-ci.com/user/environment-variables/#Defining-Variables-in-Repository-Settings
-  - docker login -e="$DOCKER_EMAIL" -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
+  - docker login -u="$DOCKER_USERNAME" -p="$DOCKER_PASSWORD"
 script:
   - docker build -t "zopanix/factorio:${TRAVIS_TAG}" .
 deploy: