add verification server setup guide

verification_server/README.md

@@ -4,4 +4,26 @@ A simple API whose purpose is to receive OAuth2 callbacks, verify them and enter
 
 # Setup
 
-TBA
+1. Make a copy of the `.env.example` file and rename it to `.env`
+
+2. Make sure all the fields are filled
+
+You have two options to run the API:
+
+### Option 1 - Docker (Recommended)
+
+```
+docker compose up
+```
+
+### Option 2 - Manual
+
+0. Install Python 3.12+
+
+1. Install dependencies
+
+```
+pip install -r requirements.txt -U
+```
+
+2. Run - See [this guide](https://fastapi.tiangolo.com/#create-it)