chore: update docs for self hosters (#2816)

apps/docs/content/docs/developers/local-development/manual.mdx

@@ -83,6 +83,15 @@ npm run prisma:seed -w @documenso/prisma
 
 </Step>
 
+<Step>
+### Optional: configure job provider
+
+The default local job provider does not support scheduled jobs required for document reminders.
+
+See the [Background Jobs](/docs/self-hosting/configuration/background-jobs) page for more information.
+
+</Step>
+
 <Step>
 ### Start the application
 
@@ -105,6 +114,20 @@ Access the Documenso application by visiting `http://localhost:3000` in your web
   certificate](/docs/developers/local-development/signing-certificate)**.
 </Callout>
 
+## Running Scripts with Environment Variables
+
+If a package script does not automatically load your `.env` and `.env.local` files, wrap it with the `with:env` script:
+
+```bash
+npm run with:env -- npm run myscript
+```
+
+The same works for `npx` when running bin scripts:
+
+```bash
+npm run with:env -- npx myscript
+```
+
 ## See Also
 
 - [Developer Quickstart](/docs/developers/local-development/quickstart) - Quick Docker-based setup