High Prio: Might want to use Cursor pagination (search up if you don't know) instead of offset pagination to reduce number of reads when scrolling the home page and paginating fetched posts.

[AndrewG828]

Offset (?page=10&limit=20): Firestore reads docs 1–200, returns 181–200, bills you for 200 reads for that one page. Page 20 = 400 reads. Cost grows linearly with depth.

Cursor (?cursor=...&limit=20): Firestore jumps to the cursor and reads 20 docs, bills 20 reads. Same cost on page 1, page 10, or page 1,000.