Failed to make requests to "assets" service

[iSokrat]

There is an issue with making requests to "assets" service.

Steps to reproduce: Precondition: Set WEB_CORS env var to * in .env files and apply it (most probably, .env.example should be updated as well). Steps:

1. Make sure all containers are run.
2. Open locally in browser localhost:8083.
3. Open Dev Tools -> Network tab (all requests should be shown).
4. Login into the app.
5. Check search request.

Actual result:

1. Preflight OPTIONS request is failed (no cors setup for "assets" service)
2. In case if p.1 is fixed, "search" POST request is failed.

Expected result: The issues p.1 and p.1 are fixed: "search" requests work fine (and the rest requests to this service as well).

About p.1 - need to add CORS-related handler to all requests for "assets" service like it's done for "users" service. About p.2 After investigation with @khyurri, it appeared we have duplicated table names (files). To resolve this, we've just renamed it to assets_files. The goal of this issue to investigate & fix similar issues with table names.