new: [README.org] add WSL2 instruction

Signed-off-by: Valentin Lab <valentin.lab@kalysto.org>

README.org

@@ -79,27 +79,39 @@ https://www.topbug.net/blog/2013/04/14/install-and-use-gnu-command-line-tools-in
 
 
 
-*** Windows - docker for windows
+*** Windows
 
-There are many ways to use docker on windows.
+There are different ways to run docker on windows, the preferred is on
+WSL2 with a native docker daemon running in the WSL2 environment.
 
-If you intend to use docker for windows, then you wont be able to use
-our tool =compose= for the moment. However you can use the full blown
+But this is still not out, so you might prefer to run "Docker For
+Windows".  In that latter case you won't be able to use our tool
+=compose= for the moment. However you can use the full blown
 =docker-compose= method.
 
+**** Windows - docker for windows
 
-**** Requirements
+***** Requirements
 
   - =bash= >= 4.3
   - =docker= >= 17.06
   - =docker-compose=
 
-**** Deployment
+***** Deployment
 
 You'll need to get our charms if you want to use our same postgres
 image.
 
-This script will take care of what you need:
+This script will take care of what you need if run from a bash in WSL:
+
+#+BEGIN_SRC shell
+curl -sS https://git.myceliandre.fr/Lokavaluto/dev-pack/raw/branch/dev/src/install.sh | bash
+#+END_SRC
+
+
+**** Windows - docker in WSL2
+
+Just run this script in a bash session under WSL2:
 
 #+BEGIN_SRC shell
 curl -sS https://git.myceliandre.fr/Lokavaluto/dev-pack/raw/branch/dev/src/install.sh | bash
@@ -110,10 +122,14 @@ curl -sS https://git.myceliandre.fr/Lokavaluto/dev-pack/raw/branch/dev/src/insta
 
 *** using =compose=
 
+This method only works if you are on linux, MacOSX, or Windows WSL2
+with docker installed inside WSL2.
+
 You need to create a =compose.yml= that suits your need. You can
 create it wherever you want as long as either you launch =compose= in
 a sub-directory or you specify the location of the =compose= file with
-the =-f COMPOSEFILE= option.  Here's a good start:
+the =-f COMPOSEFILE= option.  Here's a good start, execute these command
+in a shell:
 
 #+BEGIN_SRC shell
 cat <<EOF > compose.yml

src/install.sh

@@ -153,7 +153,7 @@ get_os() {
         Linux*)
             if [[ "$(< /proc/version)" =~ ^.*@(Microsoft|WSL).*$ ]]; then
                 e wsl
-            elif [[ "$(< /proc/version)" =~ ^.*-microsoft-*$ ]]; then
+            elif [[ "$(< /proc/version)" =~ ^.*-microsoft-.*$ ]]; then
                 e wsl2
             else
                 e linux