diff --git a/docs/docs/start/config.md b/docs/docs/start/config.md
index 850638753c1..28c01c64890 100644
--- a/docs/docs/start/config.md
+++ b/docs/docs/start/config.md
@@ -369,6 +369,15 @@ The logo and custom messages can be changed/set:
 | INVENTREE_CUSTOMIZE | customize.navbar_message | Custom message for navbar | *Not specified* |
 | INVENTREE_CUSTOMIZE | customize.hide_pui_banner | Disable PUI banner | False |
 
+The INVENTREE_CUSTOMIZE environment variable must contain a json object with the keys from the table above and
+the wanted values. Example:
+
+```
+INVENTREE_CUSTOMIZE={"login_message":"Hallo Michi","hide_pui_banner":"True"}
+```
+
+This example removes the PUI banner and sets a login message. Take care of the double quotes.
+
 If you want to remove the InvenTree branding as far as possible from your end-user also check the [global server settings](../settings/global.md#server-settings).
 
 !!! info "Custom Splash Screen Path"
diff --git a/docs/docs/start/docker_install.md b/docs/docs/start/docker_install.md
index 789fae69008..155f999c40e 100644
--- a/docs/docs/start/docker_install.md
+++ b/docs/docs/start/docker_install.md
@@ -37,6 +37,9 @@ The following files required for this setup are provided with the InvenTree sour
 
 Download these files to a directory on your local machine.
 
+!!! warning "File Extensions"
+    If your computer adds *.txt* extensions to any of the downloaded files, rename the file and remove the added extension before continuing!
+
 !!! success "Working Directory"
     This tutorial assumes you are working from a directory where all of these files are located.