Update README.md

Adding in a nonsensical URL that will need to be updated once we get the docs in the right place.

Author: mmroden

README.md

@@ -1,2 +1,8 @@
 # papr-print-files
 This repository contains all of the files necessary to print components of the Tetra PAPR.
+
+
+Please see the documentation in https://tetrabiodistributed.github.io/project-tetra-docs/how-to-guides/external-guides/building-tetra-papr/.
+
+There are 8 STL files with their accompanying STEP files for those who want to do further modifications, and the above instructions will guide you through assembling the pieces.
+