diff --git a/docs/images/docker-sealskin.md b/docs/images/docker-sealskin.md
index 3c288f900e..30ee6086d1 100644
--- a/docs/images/docker-sealskin.md
+++ b/docs/images/docker-sealskin.md
@@ -57,9 +57,9 @@ The server requires several cryptographic keys to function. You can either let t
 This is the simplest method. On the first launch with an empty `/config` volume:
 
 1.  An init process automatically generates the mandatory server key (`server_key.pem`) and a self-signed SSL certificate for the proxy (`proxy_key.pem`, `proxy_cert.pem`).
-2.  The application will then detect that no administrator exists, create a default user named `admin`, and output its **private key** directly to the container logs.
+2.  The application will then detect that no administrator exists, create a default user named `admin`, and output a configuration file admin.json into the `/config/` directory.
 
-Your only action is to check the logs immediately after the first startup, copy the entire private key block for the `admin` user, and save it securely. **This key will not be shown again.**
+Your only action is if the `HOST_URL` environment variable is not set to replace the `HOST_URL` string in the file with your IP/URL.
 
 ### Manual Pre-Configuration (Advanced)
 
@@ -104,6 +104,7 @@ services:
       - PUID=1000
       - PGID=1000
       - TZ=Etc/UTC
+      - HOST_URL=IP|subdomain.doman.com #optional
     volumes:
       - /path/to/sealskin/config:/config
       - /path/to/sealskin/storage:/storage
@@ -123,6 +124,7 @@ docker run -d \
   -e PUID=1000 \
   -e PGID=1000 \
   -e TZ=Etc/UTC \
+  -e HOST_URL=IP|subdomain.doman.com `#optional` \
   -p 8000:8000 \
   -p 8443:8443 \
   -v /path/to/sealskin/config:/config \
@@ -156,6 +158,7 @@ Containers are configured using parameters passed at runtime (such as those abov
 | `PUID=1000` | for UserID - see below for explanation |
 | `PGID=1000` | for GroupID - see below for explanation |
 | `TZ=Etc/UTC` | specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List). |
+| `HOST_URL=IP|subdomain.doman.com` | On initial setup this will be used to fill in the default admin configuration file in the `/config` directory, if unset the string HOST_URL will need to be replaced. |
 
 ### Volume Mappings (`-v`)