[Feature Request]: Provide docs about using Sentry with axios

[yarinsa]

Axios is one of the most popular HTTP clients for client-side & server-side.
Even tho that the setup seems "easy", while googling brings up some quick results, It still unclear what is the best practice?

• Should we try to capture existing transaction and apply the error there?
• Create new transaction?
• How can we guarantee that the exact same error (for different pages in the app), is merged under one issue?

Asking this question since we already set this up multiple times and we are not getting to the result we expected (but overflown with duplicate bugs).

Willing to help questions/understand best practice together

[AbhiPrasad]

Hey! Will also open this up as an issue in our docs site so we can track it there - we should def work on this.

[AbhiPrasad]

See: getsentry/sentry-docs#5737