Update README.md

Author: damalis

README.md

@@ -224,7 +224,7 @@ docker container restart slim
 add and/or remove slim site folders and files with any ftp client program in ```./slim/webapp``` folder.
 <br />You can also visit `https://example.com` to access website after starting the containers.
 
-### Database
+#### Database
 
 Database server name = database