Update README.md

Signed-off-by: Mahad Kalam <[email protected]>

README.md

@@ -11,6 +11,8 @@ You will need:
 - Bun
 - Node.js (to actually run the project)
 
+Additionally, if you want to run the server, we recommend Docker.
+
 ### Building the SMTP server
 
 Run:
@@ -27,7 +29,10 @@ cd frontend
 bun run build
 ```
 
-### Running Vortex in development
+## Running Vortex
+Ensure you've built everything first.
+
+#### In development
 
 In one terminal, run:
 ```bash
@@ -40,3 +45,21 @@ In another, run:
 cd frontend
 bun dev
 ```
+
+#### In production
+
+##### Frontend
+
+Run it anywhere, e.g. Vercel. Ensure environment variables are set.
+
+##### Backend
+
+Firstly, create a new user for Vortex.
+
+Secondly, [install rootless Docker.](https://docs.docker.com/engine/security/rootless) for the Vortex user.
+
+Finally, use this Docker command:
+
+```bash
+docker run --cap-drop=ALL --cap-add=NET_BIND_SERVICE -d -p 25:25 ghcr.io/skyfallwastaken/vortex.email:latest
+```