Hey @Tan_Tran! Let me know if I misunderstood your questions, but I believe this is what you need to know:
- Retool cannot be hosted on paths (ie: mydomain.com/retool) but can be hosted on subdomains (ie: retool.mydomain.com). Additional context here and here. We do have an internal ticket tracking this, but there aren't any concrete plans to work on this in the immediate future.
- There aren't any Retool restrictions on subdomain levels, though there are general restrictions on the total length of a domain name.