Fix hard links creation

.github/hooks/post-merge

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+# Restore hard links
+cp -rfl {workflows,actions,configurations} .github/

README.dev.md

@@ -13,16 +13,17 @@ Otherwise you can simply open an issue.
 
 ## 📖 Setup
 CI files of base directory must be *hard linked* in the `.github/.github` folder, so they can be tested.
-Since GitHub is not able to store the fact that these files are hardlink, you need to restore it executing [this script](.github/hooks/pre-commit) at every checkout.
-A `pre-commit` hook has been made to do it automatically:
+Since GitHub is not able to store the fact that these files are hardlink, you need to restore it executing [this script](.github/hooks/post-merge) at every checkout.  
+From project root:
+```bash
+.github/hooks/post-merge
 ```
-cd .git/hooks
-ln -s ../../.github/hooks/pre-commit
+First time is mandatory, then a `post-merge` hook has been made to do it automatically:
 ```
-Alternatively you can execute the script manually every time you need. From project root:
-```bash
-GIT_DIR=.git .github/hooks/pre-commit 
+cd .git/hooks
+ln -s ../../.github/hooks/post-merge
 ```
+Alternatively you can execute the script manually every time you need.  
 Now all changes will be linked and be tested with [*test* project](.github/test/) on every PR.
 **Note:** Links are for the single files. If you add directories, move or add files, you need to re-execute (or even modify) the script.