Update README.md

Author: KevinZonda

README.md

@@ -1,7 +1,19 @@
 # nginx-conf
 
-We open source our NGINX conf. You can help us improve our service by contributing our conf.
+We open source our NGINX conf. You can help us improve our service by contributing the conf. Also, we welcome you can build your own FastGit.
 
 ## Filename rule
 
 [site_url].conf
+
+## Quick install
+
+Caution, till now, quick install **only supports Debian 10**.
+
+You can also take a try if you want to deploy FastGit on any system which uses APT as its package management tool (e.g., Ubuntu).
+But we have no guarantee that the script will work properly.
+
+```bash
+$ wget https://raw.githubusercontent.com/FastGitORG/nginx-conf/master/install-debian10.sh
+$ sudo bash install-debian10.sh
+```