Integrated application with *Sencha* command
Although technically `all-classes` is not required anymore, since I managed to shift the generated output file from *Sencha command* to `static/all-classes` I'll keep this as an example if I need it in future
`build-env` executes now `sencha compile` to generate compressed `static/all-classes.js`
Since `index.html` is auto generated now by `setup.sh build` (using *Sencha command*) from `index-in.html` it's not required anymore to version it