docs: use $ to denote a command for consistency with other product docs (#468)

website/content/docs/developing/building.mdx

@@ -14,10 +14,10 @@ Building Boundary from source requires:
 - [Docker](https://docs.docker.com/get-docker/) installed
 - Basic development environment (git, xcode if you're on Mac, etc)
 
-1. `git clone https://github.com/hashicorp/boundary` or if you're using SSH auth for
-   github, `git clone git@github.com:hashicorp/boundary`
-2. `cd boundary`
-3. `make dev`
+1. `$ git clone https://github.com/hashicorp/boundary` or if you're using SSH auth for
+   github, `$ git clone git@github.com:hashicorp/boundary`
+2. `$ cd boundary`
+3. `$ make dev`
 
 Once you've built Boundary, the binary will be available at `<repo path>/bin/boundary`. Move this
 binary to somewhere in your `$PATH` such as `/usr/local/bin`.
@@ -25,6 +25,6 @@ binary to somewhere in your `$PATH` such as `/usr/local/bin`.
 ## Cross Platform Build
 
 If you need to cross compile boundary for another OS or architecture, use the [XC_OSARCH](https://github.com/hashicorp/boundary/blob/master/scripts/build.sh#L26)
-environment variable to set this. Example: `XC_OSARCH=linux/amd64 make dev`
+environment variable to set this. Example: `$ XC_OSARCH=linux/amd64 make dev`
 
 For more details, please consult the [Boundary project on GitHub](https://github.com/hashicorp/boundary#build-and-start-boundary-in-dev-mode).

website/content/docs/getting-started/connect-to-target.mdx

@@ -16,7 +16,7 @@ the target host on the target's default port (`127.0.0.1:22`). Because this
 target is proxying to our local SSH server, we can use our built-in `connect ssh` command to wrap the proxied TCP connection and SSH via Boundary:
 
 ```
-boundary connect ssh -target-id ttcp_1234567890
+$ boundary connect ssh -target-id ttcp_1234567890
 ```
 
 This will execute SSH on the target and port combination specified by the local
@@ -29,7 +29,7 @@ dash will be passed to the executed client. For instance, rather than using
 `-username`, an equivalent alternative would be:
 
 ```
-boundary connect ssh -target-id ttcp_1234567890 -- -l some-other-user
+$ boundary connect ssh -target-id ttcp_1234567890 -- -l some-other-user
 ```
 
 There is also a `-style` flag to allow the command to format arguments in a
@@ -57,7 +57,7 @@ around 'curl', you could update the default TCP target from a default port
 of `:22` to `:443`:
 
 ```
-boundary targets update tcp -default-port 443 -id ttcp_1234567890
+$ boundary targets update tcp -default-port 443 -id ttcp_1234567890
 
 Target information:
   Created Time:               Fri, 25 Sep 2020 18:35:47 PDT
@@ -90,7 +90,7 @@ Now, `curl` can be used as the executed client for the TCP target session to do
 an authenticated download of hashicorp.com:
 
 ```
-boundary connect -exec curl -target-id ttcp_1234567890 \
+$ boundary connect -exec curl -target-id ttcp_1234567890 \
          -- -vvsL --output /dev/null hashicorp.com
 
 *   Trying 76.76.21.21...
@@ -109,5 +109,5 @@ run from WSL, the following allows usage of the wrapper but while specifying the
 correct available binary, as WSL must use `.exe` when invoking Windows binaries:
 
 ```
-boundary connect ssh -style putty -exec putty.exe -target-id ttcp_1234567890
+$ boundary connect ssh -style putty -exec putty.exe -target-id ttcp_1234567890
 ```

website/content/docs/getting-started/run-and-login.mdx

@@ -11,7 +11,7 @@ description: |-
 To start Boundary in dev mode:
 
 ```bash
-boundary dev
+$ boundary dev
 ```
 
 ## Login to Boundary
@@ -23,7 +23,7 @@ dev mode. These can be overridden, or randomly generated, with flags to
 From the CLI:
 
 ```
-boundary authenticate password \
+$ boundary authenticate password \
          -login-name=admin \
          -password password \
          -auth-method-id=ampw_1234567890
@@ -39,7 +39,7 @@ You can also use these overrides to configure the [Terraform provider for
 Boundary](https://github.com/hashicorp/terraform-provider-boundary):
 
 ```hcl
- provider "boundary" {
+provider "boundary" {
     base_url             = "http://127.0.0.1:9200"
     auth_method_id       = "ampw_1234567890"
     auth_method_username = "admin"