Small wording changes

Author: macbre

readme.md

@@ -153,14 +153,16 @@ docker pull ghcr.io/macbre/nginx-http3:latest
 DOCKER_BUILDKIT=1 docker build . -t macbre/nginx --cache-from=ghcr.io/macbre/nginx-http3:latest --progress=plain
 ```
 
-Docker Compose example ,  it is necessary to expose through UDP as well as TCP to obtain HTTP/3
+### Docker Compose example
 
-```
+It is necessary to expose both UDP and TCP ports to be able to HTTP/3
+
+```yaml
   nginx:
     image: macbre/nginx-http3
     ports:
       - '443:443/tcp'
       - '443:443/udp' # use UDP for usage of HTTP/3
 ```
 
-Note : ports in TCP and UDP to expose HTTP/3 they must be the same
+Note: both TCP and UDP HTTP/3 ports needs to be the same