Update install.md (MystenLabs#1074)

* Update install.md

Spell out and link to vscode
Refine link text
Fix IDE link

* Update install.md

Add Contribute section linking out for downloading and understanding Sui

doc/src/build/install.md

@@ -7,7 +7,7 @@ dependencies.  As a prerequisite, you will need to [install
 Cargo](https://doc.rust-lang.org/cargo/getting-started/installation.html)
 version 1.59.0 or higher in order to build and install Sui on your machine.
 
-### CLIs
+## CLIs
 
 After installing `cargo`, run:
 
@@ -20,8 +20,12 @@ This will put three binaries in your `PATH`:
 * [`wallet`](wallet.md): Run a local Sui network and gateway service accessible via the wallet CLI. The wallet CLI manage keypairs to sign/send transactions.
 * [`rest_server`](rest-api.md): Run a local Sui network and gateway service accessible via a REST interface.
 
-### IDE
-For Move development, the best IDE is vscode with [this](https://marketplace.visualstudio.com/items?itemName=move.move-analyzer) plugin. Some alternative IDE options are [here]( https://github.com/MystenLabs/awesome-move#ide).
+## Contribute
+
+If you need to download and understand the Sui source code, follow [contributing to Sui](../contribute/index.md).
+
+## IDE
+For Move development, we recommend the [Visual Studio Code (vscode)](https://code.visualstudio.com/) IDE with the [Move Analyzer](https://marketplace.visualstudio.com/items?itemName=move.move-analyzer) plugin. See more [IDE options](https://github.com/MystenLabs/awesome-move#ides) in the [Awesome Move](https://github.com/MystenLabs/awesome-move) docs.
 
 ## Next steps