How to add other collection? ex. /portfolio or /product?

[okabrionz]

I really want to add any other collection to my website. but, i always failed after trying 3 times 🤣
last time i copied the blog related and change/replace text contain BLOG > PORT, post > post, and posts > portfolios.
after i do that, i got an error on rendering permalink/url.

it will be good if i can generate new collection with command ex. npm astro generate collection portfolio 🐑