Link to get-involved page instead of repeating info from there

content/page/building.md

@@ -60,5 +60,5 @@ Alternatively, you can also use the **Update Project** button on the toolbar:
 
 11\) Repeat steps 7 and 8 to build and install the updated app.
 
-If you’re interested in getting involved or following the progress of the project, please [join the development mailing list](https://lists.sourceforge.net/lists/listinfo/briar-devel), [IRC channel](https://webchat.freenode.net/#briar) or [Matrix channel](https://matrix.to/#/#freenode_#briar:matrix.org).
+If you’re interested in getting involved or following the progress of the project, please [don't hesitate to get in touch](/get-involved).