update .travis.yml for docker image build

This update will docker images in travis-ci.

Change-Id: I60d7d75708ba3bd54831cfccad5e8337c750f516

.travis.yml

@@ -7,12 +7,31 @@ env:
   global:
   - PATH=$GOROOT/bin:$GOPATH/bin:$PATH
 
-before_install:
-   # Install Glide
-  - mkdir -p "${GOPATH}/bin"
-  - curl https://glide.sh/get | bash
-  - go get -v golang.org/x/lint/golint
-
 script:
-  - make
+  - make lint
   - sudo -E env "PATH=$PATH" make test
+  - make build
+  - make image
+
+before_deploy:
+  - docker login -u "$REGISTRY_USER" -p "$REGISTRY_PASS"
+
+deploy:
+  # Push image to Dockerhub on merge to master
+  - provider: script
+    skip_cleanup: true
+    script: docker push nfvpe/sriov-cni
+    on:
+      branch: master
+  # Push image to Dockerhub on tag
+  - provider: script
+    skip_cleanup: true
+    script: >
+      bash -c '
+      docker tag nfvpe/sriov-cni nfvpe/sriov-cni:$TRAVIS_TAG;
+      docker push nfvpe/sriov-cni:$TRAVIS_TAG;
+      echo foo'
+    on:
+      tags: true
+      all_branches: true
+      condition: "$TRAVIS_TAG =~ ^v[0-9].*$"