Add info for add new profile field

Author: MartinBraquet

docs/development.md

@@ -1,27 +1,39 @@
 # Documentation for development
 
 > [!WARNING]  
-> TODO: This document is a work in progress. Please help us improve it by contributing!
+> TODO: This document is a work in progress. Please help us improve it!
 
 See those other useful documents as well:
 - [knowledge.md](knowledge.md) for high-level architecture and design decisions.
 - [README.md](../backend/api/README.md) for the backend API
 - [README.md](../backend/email/README.md) for the email routines and how to set up a local server for quick email rendering
 - [README.md](../web/README.md) for the frontend / web server
 
-### Adding a new profile variable
+### Adding a new profile field
 
-To add a profile variable (personality type, etc.), make modifications here:
-* ...
+A profile field is any variable associated with a user profile, such as age, politics, diet, etc. You may want to add a new profile field if it helps people find better matches.
 
-You will likely need to update the `profiles` table of the database. Set up an SQL migration file that updates the table, as in [migrations](../backend/supabase/migrations), and run it in the same vein as [migrate.sh](../scripts/migrate.sh).
+To do so, you can add code in a similar way as in [this commit](https://github.com/CompassConnections/Compass/commit/b94cdba5af377b06c31cebb97c0a772ad6324690) for the `diet` field.
 
-Sync the database types from supabase to the local files (which assist Typescript in typing):
+[//]: # (If you also want people to filter by that profile field, you'll also need to add it to the search filters, as done in [this commit](https://github.com/CompassConnections/Compass/commit/591798e98c51144fe257e28cf463707be748c2aa) for the education level. )
+
+Note that you will also need to add a column to the `profiles` table in the dev database before running the code; you can do so via this SQL command (change the type if not `TEXT`):
+```sql
+ALTER TABLE profiles ADD COLUMN some_new_profile_field TEXT;
+```
+
+Store it in `add_some_some_profile_field.sql` in the [migrations](../backend/supabase/migrations) folder and run [migrate.sh](../scripts/migrate.sh) from the root folder:
 ```bash
+./scripts/migrate.sh backend/supabase/migrations/add_some_new_profile_field.sql
+```
 
-yarn regen-types
+Then sync the database types from supabase to the local files (which assist Typescript in typing):
+```bash
+yarn regen-types dev
 ```
 
+That's it!
+
 ### Cover with tests
 
 Best Practices