added a short note about backups to the INSTALL files

INSTALL.txt

@@ -140,7 +140,17 @@ $a->config['system']['addon'] = 'js_upload,poormancron';
 
 and save your changes.
 
-9. (Optional) Reverse-proxying and HTTPS
+9. (Optional) Set up a backup plan
+
+Bad things will happen. Be them a hardware failure, a currupted database
+or whatever you can think of. So once the installation of your Friendica
+node is done, you should make yoursef a backup plan.
+
+The most important file is the `.htconfig.php` file in the base directory.
+As it stores all your data, you should also have a recent dump of your
+Friendica database at hand, should you have to recover your node.
+
+10. (Optional) Reverse-proxying and HTTPS
 
 Friendica looks for some well-known HTTP headers indicating a reverse-proxy
 terminating an HTTPS connection. While the standard from RFC 7239 specifies

doc/Install.md

@@ -144,3 +144,11 @@ The addon tree has to be updated separately like so:
 
     cd mywebsite/addon
     git pull
+
+###Set up a backup plan
+Bad things will happen.
+Be them a hardware failure, a currupted database or whatever you can think of.
+So once the installation of your Friendica node is done, you should make yoursef a backup plan.
+
+The most important file is the `.htconfig.php` file in the base directory.
+As it stores all your data, you should also have a recent dump of your Friendica database at hand, should you have to recover your node.

doc/de/Install.md

@@ -108,3 +108,11 @@ Du kannst auch weitere Addons/Plugins ergänzen. Ändere den Eintrag folgenderma
 `$a->config['system']['addon'] = 'js_upload,poormancron';`
 
 und speichere deine Änderungen.
+
+###Erstelle einen Backup Plan
+Es werden schlimme Dinge geschehen.
+Sei es nun ein Hardwareversage oder eine korrumpierte Datenbank.
+Deshalb solltest du dir nachdem die Installation deines Friendica Knotens abgeschlossen ist einen Backup Plan erstellen.
+
+Die wichtigste Datei ist die `.htconfig.php` im Stammverzeichnis deiner Friendica Installation.
+Und da alle Daten in der Datenbank gespeichert werden, solltest du einen nicht all zu alten Dump der Friendica Datenbank zur Hand haben, solltest du deinen Knoten wieder herstellen müssen.