[Fix]
  - Create new user using adduser instead useradd
  - Remove unused WORKDIR instruction
[Fix]
  - New gulpfile.js. The old didn't work. Assemble worked but BrowserSync not.
[Fix]
  - Fix volumes instruction
[Feature]
 - New files:
   - data.yml
   - default.hbs
   - index.hbs
   - footer.hbs
   - header.hbs