Updating the docs' dev container's README to point back to main README for more information

Author: sadukie

docs/.devcontainer/README.md

@@ -2,4 +2,6 @@
 
 This allows us to preview the docs locally without having to install Ruby or Jekyll on our machines.
 
-These docs are hosted on GitHub Pages and use the Just-the-Docs theme.
+These docs are hosted on GitHub Pages and use the Just-the-Docs theme.
+
+For more information on dev containers, see [the main README's section on dev containers](../../README.md#dev-containers-for-the-eshoponweb-repo) for details.