refs #8025 README install improved, added local inventory

.gitignore

@@ -3,3 +3,4 @@
 .vault.yml
 .passbolt.yml
 venv
+inventories/local

README.md

@@ -4,12 +4,16 @@ Collection of Ansible playbooks used in the Verdnatura server farm.
 
 ## Setup Ansible
 
-Install Ansible on Debian.
+### Debian
+
+Install Ansible package.
 ```
 apt install ansible
 ```
 
-Create Python virtual environment.
+### Python
+
+Create a Python virtual environment.
 ```
 python3 -m venv venv
 source venv/bin/activate
@@ -17,11 +21,6 @@ pip install --upgrade pip ansible==10.1.0 ansible-builder==3.1.0
 pip install -r requirements.txt
 ```
 
-Install dependencies.
-```
-ansible-galaxy collection install -r collections/requirements.yml
-```
-
 Before running any Ansible command, activate the Python virtual environment.
 ```
 source venv/bin/activate
@@ -32,14 +31,22 @@ Once you're done, deactivate the virtual environment.
 deactivate
 ```
 
+### All platforms
+
+Install dependencies.
+```
+ansible-galaxy collection install -r collections/requirements.yml
+```
+
 ## Run playbook
 
 Before merging changes into protected branches, playbooks should be tested 
-locally to ensure they work properly.
+locally to ensure they work properly. The *local* inventory can also be used, 
+wich is not uploaded to the repository.
 
 Run playbook on inventory host.
 ```
-ansible-playbook -i inventories/lab -l <host> [-t tag1,tag2...] playbooks/ping.yml
+ansible-playbook -i inventories/local -l <host> [-t tag1,tag2...] playbooks/ping.yml
 ```
 
 Run playbook on the fly on a host not declared in the inventory.