Docs: Fix links to port-management

docs/deployment/methods/dockerfiles.md

@@ -13,7 +13,7 @@ To use a dockerfile for deployment, commit a valid `Dockerfile` to the root of y
 
 ## Exposed ports
 
-See the [port management documentation](/docs/advanced-usage/port-management.md).
+See the [port management documentation](/docs/networking/port-management.md).
 
 ## Build-time Configuration Variables
 

docs/deployment/methods/images.md

@@ -22,7 +22,7 @@ The Dokku tags plugin allows you to add docker image tags to the currently deplo
 
 ### Exposed ports
 
-See the [port management documentation](/docs/advanced-usage/port-management.md).
+See the [port management documentation](/docs/networking/port-management.md).
 
 ### Listing tags for an application
 

docs/networking/proxy-management.md

@@ -83,4 +83,4 @@ dokku proxy:set node-js-app nginx
 
 ### Proxy port mapping
 
-See the [port management documentation](/docs/advanced-usage/port-management.md).
+See the [port management documentation](/docs/networking/port-management.md).