docs(contribute): add explainations about SQL migration (#893)

# Description This pull request adds some explanations on how to do the SQL migrations, required to contribute to the project, when required.

docs(contribute): add explainations about SQL migration (#893)
c4420a56 · Olyno · GitHub · 2c208e3a · c4420a56
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -18,6 +18,13 @@ Dyad is an Electron app.
 npm install
 ```
+**Apply migrations:**
+```sh
+npm run db:generate
+npm run db:push
+```
 **Run locally:**
 ```sh