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

manuscript/recipes/keycloak.md

@@ -16,7 +16,7 @@ description: Kick-ass OIDC and identity management
 
 We'll need several directories to bind-mount into our container for both runtime and backup data, so create them as follows
 
-```
+```bash
 mkdir -p /var/data/runtime/keycloak/database
 mkdir -p /var/data/keycloak/database-dump
 ```
@@ -25,7 +25,7 @@ mkdir -p /var/data/keycloak/database-dump
 
 Create `/var/data/config/keycloak/keycloak.env`, and populate with the following variables, customized for your own domain structure.
 
-```
+```bash
 # Technically, this could be auto-detected, but we prefer to be prescriptive
 DB_VENDOR=postgres
 DB_DATABASE=keycloak
@@ -48,7 +48,7 @@ POSTGRES_PASSWORD=myuberpassword
 
 Create `/var/data/config/keycloak/keycloak-backup.env`, and populate with the following, so that your database can be backed up to the filesystem, daily:
 
-```
+```bash
 PGHOST=keycloak-db
 PGUSER=keycloak
 PGPASSWORD=myuberpassword
@@ -128,4 +128,4 @@ Launch the KeyCloak stack by running `docker stack deploy keycloak -c <path -to-
 
 Log into your new instance at https://**YOUR-FQDN**, and login with the user/password you defined in `keycloak.env`.
 
---8<-- "recipe-footer.md"
+--8<-- "recipe-footer.md"