docs: update readme (#6)

Author: Aden-Q

README.md

@@ -1,7 +1,6 @@
 # redis-async
 
-An asynchronous Redis client library and a Redis CLI built in Rust, compliant with RES (Redis Serialization Protocol) 2 and 3, built with [Tokio][1].
-Inspired by [mini-redis][2].
+An asynchronous Redis client library and a Redis CLI built in Rust, compatible with RES (Redis Serialization Protocol) version 2 and 3, built with [Tokio][1]. Inspired by [mini-redis][2].
 
 ## Usage
 
@@ -38,7 +37,36 @@ More examples can be found in the [examples](./examples/) directory.
 
 ### Using the CLI
 
-TBD. Not available yet.
+You can install the CLI as a binary or run it with [Cargo][3].
+
+To install as a binary into `~/.cargo/bin`:
+
+```shell
+> cargo install --path .
+```
+
+Then you can run it:
+
+```shell
+> redis-async-cli
+```
+
+To build and run without installation:
+
+```shell
+> cargo build --release --bin redis-async-cli
+```
+
+Then you can it:
+
+```shell
+> ./target/release/redis-async-cli
+```
+
+To use the CLI, you first need to run a Redis server. Then you can run this CLI in either interactive mode or command line mode:
+
++ Interactive mode:
++ Command line mode:
 
 ## TLS/SSL
 
@@ -48,13 +76,15 @@ TBD. Not available yet.
 
 TBD. Not available yet.
 
+## RESP2/RESP3
+
 ## Supported commands
 
 This library is more on prototype. More commands will be added later on.
 
-+ PING
-+ GET
-+ SET
++ [PING][4]
++ [GET][5]
++ [SET][6]
 + DEL
 + EXISTS
 + EXPIRE
@@ -69,6 +99,20 @@ This library is more on prototype. More commands will be added later on.
 
 ## Development
 
+### Local build
+
+To build the lib:
+
+```shell
+> cargo build --lib
+```
+
+To build the CLI:
+
+```shell
+> cargo build --bin redis-async-cli
+```
+
 TBD. Thinking of which may people prefer if they don't want to install Redis on their local.
 
 Also due to gotchas from different RESP versions and Redis versions. A local dev may be necessary to for reproducible build and test environment.
@@ -85,3 +129,7 @@ The project is licensed under the [MIT license](./LICENSE).
 
 [1]: https://tokio.rs/
 [2]: https://github.com/tokio-rs/mini-redis
+[3]: https://github.com/rust-lang/cargo
+[4]: https://redis.io/docs/latest/commands/ping/
+[5]: https://redis.io/docs/latest/commands/get/
+[6]: https://redis.io/docs/latest/commands/set/