diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,2 +1,32 @@
-TODO: 
-~~When deleting domain, remove them from nameservers.~~
+1. [Overview](#overview)
+2. Features
+3. Installation
+4. Configuration
+5. The API
+6. Conclusion
+
+# Installation
+
+In KeyHelp, install PHP 8.1
+
+Settings => Configuration => Feature Settings => PHP Interpreter
+
+Set the checkmark and press Save.
+
+Wait about a minute, the installation is started via a cronjob which runs every minute.
+
+
+
+As root (or via sudo):
+
+`apt install git`
+
+Creat a new user for the domain, adn then a new domain, e.g. ns3.24unix.net.
+
+Set the PHP Version to 8.1:
+
+
+image …
+
+
+