Minor docs update for #2605

docker/README.md

@@ -58,6 +58,8 @@ $ docker run --name=gogs -p 10022:22 -p 10080:3000 -v gogs-data:/data gogs/gogs
 
 ## Settings
 
+### Application
+
 Most of settings are obvious and easy to understand, but there are some settings can be confusing by running Gogs inside Docker:
 
 - **Repository Root Path**: keep it as default value `/home/git/gogs-repositories` because `start.sh` already made a symbolic link for you.
@@ -67,7 +69,11 @@ Most of settings are obvious and easy to understand, but there are some settings
 - **HTTP Port**: Use port you want Gogs to listen on inside Docker container. For example, your Gogs listens on `3000` inside Docker, and you expose it by `10080:3000`, but you still use `3000` for this value.
 - **Application URL**: Use combination of **Domain** and **exposed HTTP Port** values(e.g. `http://192.168.99.100:10080/`).
 
-Full documentation of settings can be found [here](http://gogs.io/docs/advanced/configuration_cheat_sheet.html).
+Full documentation of application settings can be found [here](http://gogs.io/docs/advanced/configuration_cheat_sheet.html).
+
+### Crond
+
+Please set environment variable `RUN_CROND` to be `true` or `1` in order to start `crond` inside the container.
 
 ## Upgrade