Add devcontainer env

README.md

@@ -45,7 +45,7 @@ Then run:
 docker compose up -d
 ```
 
-Open `http://localhost:8080`.
+Open `http://localhost:8020`.
 
 ## Development
 
@@ -58,7 +58,9 @@ cd src
 docker compose up -d
 ```
 
-This will start the backend and frontend, proxied through Nginx at `http://localhost:8080`. Also, a Mailpit instance at `http://localhost:8025` can be used for monitoring outgoing mail.
+This will start the backend and frontend, proxied through Nginx at `http://localhost:8020`. Also, a Mailpit instance at `http://localhost:8025` can be used for monitoring outgoing mail.
+
+To use the same setup from VS Code, run `Dev Containers: Reopen in Container`. The devcontainer starts the full Compose stack, including Mailpit. Backend changes reload through Uvicorn and frontend changes are served through Vite HMR.
 
 ### Backend Development