Merge pull request #277 from zryfish/change_dockerhub_repo

change dockerhub repo

.travis.yml

@@ -1,5 +1,3 @@
-sudo: required
-
 services:
   - docker
 
@@ -7,19 +5,14 @@ language: go
 
 go:
   - 1.10
-  - tip
 
 go_import_path: kubesphere.io/kubesphere
 
 before_install:
-  - curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
   - curl https://raw.githubusercontent.com/golang/dep/master/install.sh | sh
-  - sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
-  - sudo apt-get update
-  - sudo apt-get -y install docker-ce
-  - dep ensure -v
 
 before_script:
+  - dep ensure -v
   - docker --version
 
 script: