Update travis config for gulp.

.travis.yml

@@ -34,19 +34,16 @@ install:
   - pip install -r requirements.txt
 
   # Install node
-  - nvm install 8
-
-  # Move into the static_src folder where we will compile the FE
-  - cd ./opentech/static_src
+  - nvm install 10
 
   # Install node dependencies
   - npm install --quiet
 
-  # Build the static files
-  - npm run build:prod
+  # Install gulp-cli
+  - npm install -g gulp-cli
 
-  # Change back to the original folder
-  - cd -
+  # Build the static files
+  - gulp deploy
 
 # Run the tests
 script: