Updated Installation (markdown)

Installation.md

@@ -264,9 +264,11 @@ It is also recommended that you fill in the initial data into the database:
 After executing the fill command the database will contain:
 * Instance with administrator registered as local account with credentials user 
   name: `admin@admin.com`, password: `admin`
-* Runtime environments which ReCodEx can handle
 * Default single hardware group which might be used for workers
-* Pipelines for runtime environments which can be used when building exercises
+
+In the past, the initial fill also contained pipelines and runtime environments,
+but they have been moved to separate repository [`runtimes`](https://github.com/ReCodEx/runtimes).
+Check out its readme how to import runtime environments you wish to support in your system.
 
 To modify the data further, you might want to set up some database administration
 tool. We are shipping the [Adminer](https://www.adminer.org/) along with core