Add some dependencies and split set-up steps.

Ref #1

README.md

@@ -1,5 +1,11 @@
 # Risotto
 
+## Install dependencies
+
+- python3-dkimpy
+- python3-cheetay
+- ldns-utils
+
 ## Installation
 
 Clone projects:
@@ -26,13 +32,18 @@ Set up infrasctructure:
 cp server.json.example server.json
 ```
 
-Change the configuration.
+Modify infrastructure description as required.
+
+Generate the configuration:
+
+```bash
+./bootstrap.py
+```
 
 Send configuration to remote server:
 
 ```bash
 HOST=cloud.silique.fr
-./test.py
 rm -f installations.tar
 tar -cf installations.tar installations
 scp installations.tar root@$HOST: