Post-installation tasks

[bomoko]

In some cases, we may need to run post installation tasks.

For example, if we're installing a php application, some of the options a user has selected may require us to update the composer.json file.

This could, presumably, be done by actually templating out the json file, but perhaps a more generic solution would be to have commands that could be run on the repo to transform it.

One option would be to run the commands in a particular container. For example, if you needed to run "composer update" etc. one could spin up a docker container and run that command in there.