fix: readme had not proper content

Everyone should be happy now!

README.md

@@ -3,7 +3,7 @@ Core api and Esp32 code for displaying weather data and public transport informa
 
 <img width="800" height="480" alt="image" src="https://github.com/user-attachments/assets/ef5af0c6-ea3a-494d-b2af-3de6e70b3e6a" />
 
-## Features
+## Features 😺
 - Display current weather data
 - Display public transport information
 - Display time and date
@@ -78,6 +78,7 @@ API endpoints:
 
 When running, API documentation is available through Scalar at `/scalar`.
 
+```mermaid
 flowchart TD
 subgraph ESP32 Device
 ESP[ESP32 E-Ink Display]
@@ -86,7 +87,7 @@ ESP -->|HTTP GET /home/default.jpg| API
 end
 
     subgraph HomeApi
-        API[HomeController (API)]
+        API[HomeControllerAPI]
         API -->|MediatR| Handlers
         Handlers -->|Service Calls| Services
         Services -->|Refit Clients| Clients
@@ -105,3 +106,4 @@ end
     ExtAPIs -.-> AuroraAPI
     ExtAPIs -.-> NominatimAPI
     ExtAPIs -.-> ResRobotAPI
+```