Instrument Astro Server via Middleware #9444
Description
Problem Statement
Astro allows to add middleware to the server-side if the app is configured for SSR (or in a hybrid config) and an adapter (e.g. Node, vercel, etc) is used or if it's in SSG mode and static paths are supplied.
Solution Brainstorm
We should expose our own middleware to create spans/txns for incoming pageload or endpoint requests.
### Tasks
- [ ] https://github.com/getsentry/sentry-javascript/pull/9445
- [ ] https://github.com/getsentry/sentry-javascript/pull/9483
- [ ] https://github.com/getsentry/sentry-javascript/pull/9532
- [ ] https://github.com/getsentry/sentry-docs/pull/8581