chore: Update README.md to include generation of mock data (#241)

README.md

@@ -125,6 +125,42 @@ Consider checking out the commands listed in /app/Makefile.
 
 > Please only use them if you know what you are doing!
 
+### Generating mock data
+
+Generate mock users, opportunities, applications and reviews using **faker** scripts.
+
+How to generate mock data:
+
+1. **Run local DB**
+
+    ```bash
+    docker-compose up
+    ```
+
+2. **Login via Slack Authentication**
+
+     - Open the UI and log in via Slack authentication. This will create a session and a User entry in the DB.
+
+3. **Seed local DB**
+
+   - Run the following command to seed the local DB with mock data:
+
+    ```bash
+    bun db:seed
+    ```
+
+Command Line Options:
+
+```bash
+~ bun db:seed -h
+```
+
+Reset/Clear DB:
+
+```bash
+~ bun prisma migrate reset
+```
+
 ### Working on a Linear ticket
 
 Working with Linear tickets is very similar to working with GitHub issues.