Update Building section in README

README.md

@@ -2,13 +2,19 @@
 
 ## Building
 
+First, rename the `.env.example` file to `.env` and the `docker-compose.yml.example` to `docker-compose.yml`. Then fill in the values in the `.env` file. The `docker-compose.yml` file should be fine as it is, but you can change the ports and volume locations if you want to.
+
 To build the app, compile the docker container.
 
 ```bash
 docker compose build
 ```
 
-To start it you then just have to set up the `docker-compose.yml` and environment variables and use `docker compose up`.
+Afterwards you can start the app.
+
+```bash
+docker compose up
+```
 
 ## Setup