document custom project names

[edublancas]

i see that the custom project name appears now:

but we don't have documentation

[bryannho]

@edublancas custom project names are mentioned as a paid feature in the pricing overview but not anywhere else.

since it's a paid feature, I don't think it would be appropriate to document in the quickstart guide, but there doesn't seem to be another place to put it.

I also noticed we haven't documented the labels option either. Maybe we could a new page, Identifying project, where we document the custom project name and labels feature? I'll add a note that mentions that custom names is a paid feature

[edublancas]

I think the project name can be documented here: https://docs.cloud.ploomber.io/en/latest/user-guide/custom-domains.html

we can rename the function to: Custom domains/subdomains

changing the project name changes the x portion in x.ploomberapp.io

for the labels, we can create a new "Managing apps" section in the user guide and explain that labels can help you organize and identify your apps

[bryannho]

@edublancas whoops forgot to mention this issue in the PR #103 , this issue has been addressed so you can close it now