Document internal "guidelines"

Author: Roxedus

README.md

@@ -15,3 +15,11 @@ If adding multiple mods, enter them in an array separated by `|`, such as `DOCKE
 * Finally edit the `.github/workflows/BuildImage.yml`. Customize the build branch, and the vars for `BASEIMAGE` and `MODNAME`.
 * Ask the team to create a new branch named `<baseimagename>-<modname>`. Baseimage should be the name of the image the mod will be applied to. The new branch will be based on the `template` branch.
 * Submit PR against the branch created by the team.
+
+
+## Tips and tricks
+
+* To decrease startup times when multiple mods are used, we have consolidated `apt-get update` down to one file. As seen in the [nodejs mod](https://github.com/linuxserver/docker-mods/tree/code-server-nodejs/root/etc/cont-init.d)
+* Some images has helpers built in, these images are currently:
+    * [Openvscode-server](https://github.com/linuxserver/docker-openvscode-server/pull/10/files)
+    * [Code-server](https://github.com/linuxserver/docker-code-server/pull/95)