edit Readme to use full Markdown syntax

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

README.md

@@ -1,18 +1,30 @@
+# Tsunami
+
 **Netbox + XO + Terraform + Ansible = The best deployment kit**
 
-How to run:<br>
-cp passwd.auto.tfvars.example passwd.auto.tfvars<br>
-replace all variable to match your infrastructure
+## Configuration
 
-edit cloud_network_config.tftpl to replace eth0 (to be changed)
+replace your variables:
+```bash
+# copy password template
+cp passwd.auto.tfvars.example passwd.auto.tfvars
 
-create a prefix with IP you want to use on netbox <br>
-edit variables.auto.tfvars 
+# edit with your infra passwords
+nano passwd.auto.tfvars
+
+# set your template vm network interface
+nano cloud_network_config.tftpl
+
+# create a prefix with IP you want to use on netbox, and set your vm variables
+nano variables.auto.tfvars
+```
 
 You can add your playbook in the folder playbooks/ and use them in variables.auto.tfvars
 
-then
+## Run
 
-terraform init<br>
-terraform plan<br>
+```bash
+terraform init
+terraform plan
 terraform apply
+```