Update BUILD.md for web-vault 2.x.x

Update BUILD.md to reflect changes to the web-vault build process

BUILD.md

@@ -17,28 +17,22 @@ cargo build --release
 When run, the server is accessible in [http://localhost:80](http://localhost:80).
 
 ### Install the web-vault
-Download the latest official release from the [releases page](https://github.com/bitwarden/web/releases) and extract it.
-
-Modify `web-vault/settings.Production.json` to look like this:
-```json
-{
-  "appSettings": {
-    "apiUri": "/api",
-    "identityUri": "/identity",
-    "iconsUri": "/icons",
-    "stripeKey": "",
-    "braintreeKey": ""
-  }
-}
+Clone the git repository at [bitwarden/web](https://github.com/bitwarden/web) and checkout the latest release tag (e.g. v2.1.1):
+```sh
+# clone the repository
+git clone https://github.com/bitwarden/web.git web-vault
+cd web-vault
+# switch to the latest tag
+git checkout "$(git tag | tail -n1)"
 ```
 
 Then, run the following from the `web-vault` directory:
 ```sh
 npm install
-npx gulp dist:selfHosted
+npm run dist:selfhost
 ```
 
-Finally copy the contents of the `web-vault/dist` folder into the `bitwarden_rs/web-vault` folder.
+Finally copy the contents of the `web-vault/build` folder into the `bitwarden_rs/web-vault` folder.
 
 # Configuration
 The available configuration options are documented in the default `.env` file, and they can be modified by uncommenting the desired options in that file or by setting their respective environment variables. Look at the README file for the main configuration options available.