feat: update readme

README.md

@@ -1,3 +1,19 @@
 # local-mini-kms
 
 Mini-KMS runs local written by Rust
+
+## Startup Server
+
+```shell
+./local-mini-kms serve
+```
+
+```shell
+./local-mini-kms cli --init
+```
+
+## Local Client
+
+```shell
+./local-mini-kms cli --offline-init
+```