docs: update cli usage

Author: linux-china

README.md

@@ -6,15 +6,13 @@ or `application.yml`.
 
 # Get Started
 
-Download dotenvx-cli from [dotenvx-rs](https://github.com/linux-china/dotenvx-rs), 
+Download the last version of dotenvx-cli from [dotenvx-rs](https://github.com/linux-china/dotenvx-rs),
 and follow the steps below to add encrypted items.
 
 ```bash
-$ cd project_dir
+$ cd spring-boot-project-dir
 $ dotenvx init
-$ ls .env*
-$ cd src/main/resources
-$ dotenvx -f application.properties nick Jackie
+$ dotenvx set --encrypt nick Jackie
 ```
 
 `application.properties` content example:
@@ -53,4 +51,4 @@ and you will notice the decrypted value as hints in the configuration files.
 * [Dotenvx](https://dotenvx.com/): encrypts your .env files, limiting their attack vector while retaining their
   benefits.
 * [dotenvx-rs](https://github.com/linux-china/dotenvx-rs): Dotenvx Rust SDK/CLI
-* [dotenvx-java](https://github.com/linux-china/dotenvx-java): Dotenvx Java SDK
+* [dotenvx-java](https://github.com/linux-china/dotenvx-java): Dotenvx Java SDK