Update docker-bookstack.md

images/docker-bookstack.md

@@ -77,9 +77,16 @@ services:
 
 Container images are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate `<external>:<internal>` respectively. For example, `-p 8080:80` would expose port `80` from inside the container to be accessible from the host's IP on port `8080` outside the container.
 
-| Parameter | Function |
+### Ports (`-p`)
+
+| Port | Function |
 | :----: | --- |
 | `-p 80` | will map the container's port 80 to port 6875 on the host |
+
+### Environment Variables (`-e`)
+
+| Env | Function |
+| :----: | --- |
 | `-e PUID=1001` | for UserID - see below for explanation |
 | `-e PGID=1001` | for GroupID - see below for explanation |
 | `-e DB_HOST=<yourdbhost>` | for specifying the database host |
@@ -87,6 +94,11 @@ Container images are configured using parameters passed at runtime (such as thos
 | `-e DB_PASS=<yourdbpass>` | for specifying the database password |
 | `-e DB_DATABASE=bookstackapp` | for specifying the database to be used |
 | `-e APPURL=your.site.here.xyz` | for specifying the url your application will be accessed on  |
+
+### Volume Mappings (`-v`)
+
+| Volume | Function |
+| :----: | --- |
 | `-v /config` | this will store any uploaded data on the docker host |
 
 ## User / Group Identifiers