Fix .travis.yml: add make docker-build first

ryukinix · ryukinix · commit 39836f4f842a · 2019-03-10T17:32:58.000-03:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,4 +1,6 @@
 services:
   - docker
 
-script: make docker-check
+script:
+  - make docker-build
+  - make docker-check
