Add `PORT` usage in Readme

Add `PORT` usage in Readme for repointing internal port, as mentioned on https://github.com/bastienwirtz/homer/issues/489

diff --git a/README.md b/README.md
index ea93f4febf05614e5a54fb575a36535ac730eb62..783e4656d0fd899b28668be4483de89ff743cac1 100644 (file)
--- a/README.md
+++ b/README.md
@@ -89,6 +89,10 @@ Install example configuration file & assets (favicons, ...) to help you get star
 * **`SUBFOLDER`** (default: `null`)
 If you would like to host Homer in a subfolder, (ex: *http://my-domain/**homer***), set this to the subfolder path (ex `/homer`).
 
+* **`PORT`** (default: `8080`)
+If you would like to change internal port of Homer from default `8080` to your port choice.
+
+
 #### With docker-compose
 
 A [`docker-compose.yml`](docker-compose.yml) file is available as an example. It must be edited to match your needs. You probably want to adjust the port mapping and volume binding (equivalent to `-p` and `-v` arguments).