add links to repro for i18n problems

Author: pieh

adapters-notes.md

@@ -1,7 +1,8 @@
 ## Feedback
 
 - Files from `public` directory not listed in `outputs.staticFiles`. Should they be?
-- `routes.headers` does not contain immutable cache-control headers for `_next/static`
+- `routes.headers` does not contain immutable cache-control headers for `_next/static`. Should those
+  be included?
 - In `onBuildComplete` - `config.images.remotePatterns` type is `(RemotePattern | URL)[]` but in
   reality `URL` inputs are converted to `RemotePattern` so type should be just `RemotePattern[]` in
   `onBuildComplete` (this would require different config type for `modifyConfig` (allow inputs
@@ -14,11 +15,10 @@
   or `wasm` (tho wasm files are included in assets, so I think I have a way to support those as-is,
   but need to to make some assumption about using extension-less file name of wasm file as
   identifier)
-- `outputs.staticFiles` (i18n enabled) custom fully static (no `getStaticProps`) `/pages/404.js`
-  `filePath` point to not existing file (it doesn't have i18n locale prefix in `staticFiles` array,
-  actual 404.html are written to i18n locale prefixed directories)
-- `outputs.staticFiles` (i18n enabled) custom `/pages/404.js` with `getStaticProps` result in fatal
-  `Error: Invariant: failed to find source route /en/404 for prerender /en/404` directly from
+- `outputs.staticFiles` (i18n enabled) custom fully static (no `getStaticProps`) `/pages/*`
+  `filePath` point to not existing file - see repro at https://github.com/pieh/i18n-adapters
+- `outputs.staticFiles` (i18n enabled) custom `/pages/*` with `getStaticProps` result in fatal
+  `Error: Invariant: failed to find source route /en(/*) for prerender /en(/*)` directly from
   Next.js:
 
   ```
@@ -31,7 +31,10 @@
   (additionally - invariant is reported as failing to run `onBuildComplete` from adapter, but it
   happens before adapter's `onBuildComplete` runs, would be good to clear this up a bit so users
   could report issues in correct place in such cases. Not that important for nearest future / not
-  blocking)
+  blocking).
+
+  See repro at https://github.com/pieh/i18n-adapters (it's same as for point above, need to
+  uncomment `getStaticProps` in one of the pages in repro to see this case)
 
 - `output: 'export'` case seems to produce outputs as if it was not export mode (for example having
   non-empty `outputs.appPages` or `outputs.prerenders`). To not have special handling for that in