change bash codefence to console, other opportunistic fences

Signed-off-by: Phill Kelley <[email protected]>

Author: Paraphraser

docs/Containers/MariaDB.md

@@ -19,7 +19,7 @@ The port is 3306. It exists inside the docker network so you can connect via `ma
 
 Before starting the stack, edit the `docker-compose.yml` file and check your environment variables. In particular:
 
-```
+```yaml
   environment:
     - TZ=Etc/UTC
     - MYSQL_ROOT_PASSWORD=
@@ -36,7 +36,7 @@ You only get the opportunity to change the `MQSL_` prefixed environment variable
 
 	* Stop the container and remove the persistent storage area:
 
-		```
+		```console
 		$ cd ~/IOTstack
 		$ docker-compose rm --force --stop -v mariadb
 		$ sudo rm -rf ./volumes/mariadb
@@ -45,7 +45,7 @@ You only get the opportunity to change the `MQSL_` prefixed environment variable
 	* Edit `docker-compose.yml` and change the variables.
 	* Bring up the container:
 
-		```
+		```console
 		$ docker-compose up -d mariadb 
 		```
 
@@ -57,7 +57,7 @@ You only get the opportunity to change the `MQSL_` prefixed environment variable
 
 You can open a terminal session within the mariadb container via:
 
-```
+```console
 $ docker exec -it mariadb bash
 ```
 
@@ -98,7 +98,7 @@ Portainer's *Containers* display contains a *Status* column which shows health-c
 
 You can also use the `docker ps` command to monitor health-check results. The following command narrows the focus to mariadb:
 
-```bash
+```console
 $ docker ps --format "table {{.Names}}\t{{.Status}}"  --filter name=mariadb
 ```
 
@@ -169,7 +169,7 @@ You can customise the operation of the health-check agent by editing the `mariad
 
 To update the `mariadb` container:
 
-```
+```console
 $ cd ~/IOTstack
 $ docker-compose build --no-cache --pull mariadb
 $ docker-compose up -d mariadb