fix(installer): set correct default port on base_uri (#1625)

Author: NeoIsRecursive

.env.example

@@ -2,7 +2,7 @@
 ENVIRONMENT=local
 
 # The base URI that's used for all generated URIs
-BASE_URI=http://localhost
+BASE_URI=http://localhost:8000
 
 # Setting to `false` force-disable internal caches.
 INTERNAL_CACHES=true