added quickstart script to readme

README.md

@@ -18,6 +18,12 @@ step ca init --ssh --acme
 
 ## SSH Certificates
 
+Install script:
+
+```bash
+curl -sL https://gitea.john-stream.com/john/janus/raw/branch/main/scripts/ssh-server-check.sh | bash
+```
+
 ### Server
 
 Use step-ca to sign an existing public key to produce a signed certificate with some principals on it.