Enhance the installation instructions.

The local backoffice of Grav can be used to craft courses.
This is inspiring!

README.md

@@ -5,8 +5,15 @@ These are the sources of an instance of Grav tailored for the courses of M3P2.
 The plugins and themes are included.
 Only the php vendors are not included.
 
+
 ## Run locally for fast development
 
+PHP `7.1` (or above) is recommended.  Do tell us what works or not for you.
+
+Clone this repository:
+
+    git clone --recursive https://m3p2.ljbac.com/m3p2/grav-website.git m3p2-html-generator
+
 Install dependencies:
 
 	bin/grav install
@@ -17,7 +24,8 @@ Then try out
 
 to troubleshoot.
 
-Add the courses from the other repository
+
+Add the courses from the other repository, if you did not use `git clone --recursive`:
 
 	bin/clone_courses.sh
 
@@ -27,6 +35,10 @@ And run locally
 	php -S localhost:8000 system/router.php
 
 
+At this point, you should be asked to set admin credentials.
+These will allow you to access the `/admin` section of the website.
+
+
 ## Mirror the courses to generate a static website
 
 This may come in handy when we'll want offline access
@@ -46,7 +58,7 @@ Since our plugins and themes are in this repository, they are frozen.
 
 So far, Grav itself is safe to update, as well as all plugins **but mathjax** (until they merge our MR).
 
-Todo: look up .dependencies and perhaps we'll remove the plugins dir altogether from this repository.
+Waiting for future Grav updates to specify deps more elegantly (they're working on it at this time).
 
 The theme `textbook` is tailored for M3P2 courses.
 The plugin `gitlab-markdown-adapter` was expressly made for this Grav instance.