Add notes about axios - it's a simple but vital software

[sanjarcode]

1. axios works the same way on web, mobile (android, ios) and Node (TBD)
2. The implicit way to pass headers, query params and payloads.
3. Auto content-type.
4. File handling part is also partially handled
5. interceptors are simple to use

of course, await-to-js combined with axios makes code very simple (compared to try catch)