adding an encryption key field.

config.yaml

@@ -20,6 +20,8 @@ web:
     frontend:
       path: /opt/fasten/web
 database:
+  #  encryption:
+  #    key: ''
   type: 'sqlite' # postgres also supported, but still experimental changes
   location: '/opt/fasten/db/fasten.db' # if postgres use a DSN, eg. `host=localhost user=gorm password=gorm dbname=gorm port=9920 sslmode=required TimeZone=Asia/Shanghai`
 log: