fix travis ci.

Author: ericp1337

.travis.yml

@@ -5,6 +5,6 @@ services:
 
 script:
   - docker build \
-  --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
-  --build-arg VCS_REF=`git rev-parse --short HEAD` \
-  -t burp-server:latest .
+    --build-arg BUILD_DATE=`date -u +"%Y-%m-%dT%H:%M:%SZ"` \
+    --build-arg VCS_REF="$TRAVIS_COMMIT" \
+    -t computerfr33k/burp-server:"$TRAVIS_BRANCH" .