Custom commands
Custom commands enables running any custom actions after build and before generating a release.
Custom commands will be executed:
- after script, styles, HTML and other bundles have been built, and
 - before a release 
.zipfile is generated 
Custom commands are run for both dev and prod builds. 
To configure custom commands specify commands build configuration key. For example:
1 2 3  |  | 
This configuration would first build the extension, then run a custom Python script, then for a production build, generate the extension zip file.