[jinja_debug] Add reference to jinja_debug

content/docs/cli/server/contents.lr

@@ -12,11 +12,14 @@ body:
 
 The server command will launch a local server for development.
 
-Lektor's developemnt server will automatically build all files into
+Lektor's development server will automatically build all files into
 pages similar to how the build command with the `--watch` switch
 works, but also at the same time serve up the website on a local
 HTTP server.
 
+Exporting the `LEKTOR_DEV=1` environment variable will also enable
+[Jinja debug extension  :ext](https://jinja.palletsprojects.com/en/3.0.x/extensions/#debug-extension).
+
 ## Options
 
 - `-h, --host TEXT`: The network interface to bind to.  The default is the

content/docs/templates/contents.lr

@@ -40,6 +40,10 @@ evaluated in but the following are always available:
 | `alt`          | A string that identifies the [Alternative :ref](../content/alts/) of the page.
 | `config`       | Gives access to the Lektor project configuration.
 
+Additionally, exporting the `LEKTOR_DEV=1` environment variable when running [`lektor server` :ref](../cli/server/)
+ will also enable [Jinja debug extension  :ext](https://jinja.palletsprojects.com/en/3.0.x/extensions/#debug-extension)
+which may be useful in template development.
+
 ## The First Template
 
 So let's dive in making our first template.  In case you went through the