feat: update

.travis.yml

@@ -3,7 +3,7 @@ before_install:
   - echo "`date -u '+%Y-%m-%d %H:%M:%S'` Start to build Luna"
   - docker pull node:latest
 install:
-  - sed -i 's/{{BUILD_NUMBER}}/'${BUILD_NUMBER}'/g' src/environments/environment.prod.ts
+  - sed -i 's/{{BUILD_NUMBER}}/'$BUILD_NUMBER'/g' src/environments/environment.prod.ts
   - docker run -i -v `pwd`:/data -w /data node  sh -c "npm i && npm rebuild node-sass&& npm run-script build"
 script:
   - docker build -t registry.fit2cloud.com/jumpserver/luna:test .