diff --git a/README.md b/README.md
index 56bd4d0..8d052ee 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,6 @@ If you are [using custom app directories](https://docs.nextcloud.com/server/late
 
 Afterwards, you can set `"path" => OC::$SERVERROOT . "/your_custom_apps_folder",` in your `config.php` file, per the [official documentation](https://docs.nextcloud.com/server/latest/admin_manual/apps_management.html#using-custom-app-directories).
 
- 
 ### Strict reverse proxies
 
 This image uses a self-signed certificate by default. This naturally means the scheme is `https`.
@@ -107,6 +106,9 @@ If you are using a reverse proxy which validates certificates, you need to [disa
 
 To help you get started creating a container from this image you can either use docker-compose or the docker cli.
 
+>[!NOTE]
+>Unless a parameter is flaged as 'optional', it is *mandatory* and a value must be provided.
+
 ### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose))
 
 ```yaml
@@ -148,7 +150,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 
 | Parameter | Function |
 | :----: | --- |
-| `-p 443` | WebUI |
+| `-p 443:443` | WebUI |
 | `-e PUID=1000` | for UserID - see below for explanation |
 | `-e PGID=1000` | for GroupID - see below for explanation |
 | `-e TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). |