docs: add "Examples"

README.md

@@ -1,2 +1,24 @@
 # handy-sshd
 Portable SSH Server 
+
+## Examples
+
+```bash
+# Listen on 2222 and accept user name "john" with password "mypassword"
+handy-sshd -p 2222 --user "john:mypassword"
+```
+
+```bash
+# Listen on 2222 and accept user name "john" without password
+handy-sshd -p 2222 --user "john:"
+```
+
+```bash
+# Listen on 2222 and accept users "john" and "alice" without password
+handy-sshd -p 2222 --user "john:" --user "alice:"
+```
+
+```bash
+# Listen on unix domain socket
+handy-sshd --unix-socket /tmp/my-unix-socket --user "john:"
+```