README.md aktualisiert

README.md

@@ -1,13 +1,28 @@
 # Ansible Playbook for running/installing Nextcloud via Docker
 
-## Disclaimer
+# Disclaimer
 Use at your own risk.
 
-Please look first at the playbooks downloaded and run by the nextcloud-install.sh to understand whats going on and then decide if it is fine for you to run on you system.
+Please look first at the playbooks downloaded and run by the nextcloud-install.sh to understand whats going on and then decide if it is fine for you to run on your system.
 
 You also should test this on an non-productive Test-System to fit your needs.
 
-## Quick-Install
+# Prerequisites
+This is needed for Downloading the Software, access to the Server from the Internet and the automatized creation of SSL-Certificates via letsencrypt.
+- You need up-to-date Debian System preinstalled. Best with SSH-Connection. Maybe its working on debian-based Systems like Ubuntu too.
+- Your System should have a working Internet-Access
+- Your Machines hostname and subdomains should be accessible from the internet Port 80/443.
+Depending on your local setup you have to define nedded IPv4 (Portforwarding) or IPv6 settings on your router and maybe you need a service like dynDNS e.B. from (deSEC - https://desec.io/) for your dynamic IP.
+You can check this for example woth the following command:
+```
+host nextcloud.$(hostname)
+```
+Change the hostname with the following command for example with dedyn/deSEC to myhost.dedyn.io:
+```
+hostnamectl hostname myhost.dedyn.io
+```
+
+# Quick-Install
 Simply download an run nextcloud-install.sh and run it on you Debian(based) System:
 
 1. Download
@@ -20,3 +35,5 @@ This runs some other Playbooks needed by this playbook.
 ```
 bash nextcloud-install.sh
 ```
+
+#