Implement Pagination on the Backend

We need to implement pagination when the user loads posts. We’ll implement lazy loading on the frontend in https://github.com/FightPandemics/FightPandemics/issues/127

@robinv85 thinks this might be best handled using mongo “skip” and “limit” parameters https://fightpandemics.slack.com/archives/C010V0DDHLN/p1586966620489600?thread_ts=1586966336.487500&cid=C010V0DDHLN

Let’s shoot for loading 5 posts at a time

Check out backend/lib/endpoints/schema/posts.js:

const getPostsSchema = {
  querystring: S.object()
    .prop("authorId", S.string())
    .prop("skip", S.integer())
    .prop("limit", S.integer()),
};```

[mushketyk]

Thank you for the comments @Naraujo13. All make sense. I’ll try to update the PR today.

[mushketyk]

Damn. Already implemented it for projects API and created a PR 😃