Add markdown linting (without breaking the site this time!)

manuscript/recipes/wetty.md

@@ -25,7 +25,8 @@ Here are some other possible use cases:
 ### Prepare environment
 
 Create wetty.env, and populate with the following variables per the [oauth_proxy](/reference/oauth_proxy/) instructions:
-```
+
+```bash
 OAUTH2_PROXY_CLIENT_ID=
 OAUTH2_PROXY_CLIENT_SECRET=
 OAUTH2_PROXY_COOKIE_SECRET=
@@ -94,4 +95,4 @@ Browse to your new browser-cli-terminal at https://**YOUR-FQDN**. Authenticate w
 [^1]: You could set SSHHOST to the IP of the "docker0" interface on your host, which is normally 172.17.0.1. (_Or run ```/sbin/ip route|awk '/default/ { print $3 }'``` in the container_) This would then provide you the ability to remote-manage your swarm with only web access to Wetty.
 [^2]: The inclusion of Wetty was due to the efforts of @gpulido in our [Discord server](http://chat.funkypenguin.co.nz). Thanks Gabriel!
 
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