added variables description

Author: bdito

README.md

@@ -3,15 +3,119 @@ KeyBox is an open-source web-based SSH console that centrally manages administra
 Web-based administration is combined with management and distribution of user's public SSH keys.
 Key management and administration is based on profiles assigned to defined users.
 
+## KeyBox - Version: 2.84.00
 
 ## How to use this image
-	$ docker run -d -v /my/own/datadir:/a/data -p 8443:8443 adito/keybox
-Now you can access keybox at  "https://host-ip:8443"
+```
+	$ docker run -d -v /my/own/datadir:/a/keydb -p 8443:8443 adito/keybox
+```
+now you can access keybox at "https://host-ip:8443"
 
-## How to edit the keybox-config
+## Variables
+
+Example:
+```
+	$ docker run -d -v /my/own/datadir:/a/keydb -p 8443:8443 -e enableOTP=false adito/keybox
+```
+I disabled two-factor-authentication in this example
+
+#### here you can find all variables and their default values
+
+set to true to regenerate and import SSH keys
+```
+resetApplicationSSHKey=false
+```
+
+SSH Key Type 'dsa' or 'rsa' for generated keys
+```
+sshKeyType=rsa
+```
+
+SSH Key Length for generated keys
+```
+sshKeyLength=2048
+```
+
+private ssh key, leave blank to generate key pair
+```
+privateKey=
+```
+
+public ssh key, leave blank to generate key pair
+```
+publicKey=
+```
+
+default passphrase, leave blank for key without passphrase
+```
+defaultSSHPassphrase=${randomPassphrase}
+```
+
+enable audit
+```
+enableInternalAudit=false
+```
+
+keep audit logs for in days
+```
+deleteAuditLogAfter=90
+```
+
+set an audit log server using log4j (ex: logstash). Edit the log4j.xml to configure appender.
+```
+auditLogAppender=
+```
+
+The number of seconds that the client will wait before sending a null packet to the server to keep the connection alive
+```
+serverAliveInterval=60
+```
+
+default timeout in minutes for websocket connection (no timeout for <=0)
+```
+websocketTimeout=0
+```
+
+enable SSH agent forwarding
+```
+agentForwarding=false
+```
+
+enable two-factor authentication
+```
+enableOTP=true
+```
+
+enable key management
+```
+keyManagementEnabled=true
+```
+
+set to true to generate keys when added/managed by users and enforce strong passphrases set to false to allow users to set their own public key
+```
+forceUserKeyGeneration=true
+```
+
+authorized_keys refresh interval in minutes (no refresh for <=0)
+```
+authKeysRefreshInterval=120
+```
+
+Regular expression to enforce password policy
+```
+passwordComplexityRegEx=((?=.*\\d)(?=.*[A-Z])(?=.*[a-z])(?=.*[!@#$%^&*()+=]).{8\,20})
+```
+
+Password complexity error message
+```
+passwordComplexityMsg=Passwords must be 8 to 20 characters\, contain one digit\, one lowercase\, one uppercase\, and one special character
+```
+
+specify a external authentication module (ex: ldap-ol, ldap-ad).  Edit the jaas.conf to set connection details
+```
+jaasModule=
+```
 
-The keybox-config will be automatically created at the first container start in your "/my/own/datadir".
-Now you can edit the file "KeyBoxConfig.properties".
 
 ## Supported Docker versions