Add language to each codeblock

[ci skip]

docs/getting-started/install/linode.md

@@ -24,9 +24,11 @@ __Warning__: These steps will delete *everything* on your Linode.
 
 5. SSH into your Linode as root and run the following commands:
 
-        apt-get update
-        apt-get -qq upgrade
-        apt-get -qq install linux-image-virtual linux-image-extra-virtual
+    ```shell
+    apt-get update
+    apt-get -qq upgrade
+    apt-get -qq install linux-image-virtual linux-image-extra-virtual
+    ```
 
 6. When prompted, install Grub onto the first hard drive.
 

docs/getting-started/install/vagrant.md

@@ -4,12 +4,13 @@
 - Download and install [Vagrant](http://www.vagrantup.com/downloads.html)
 - Clone Dokku
 
-    ```
+    ```shell
     git clone https://github.com/dokku/dokku.git
     ```
 
 - Create VM
-    ```
+
+    ```shell
     # Optional ENV arguments:
     # - `BOX_NAME`
     # - `BOX_URI`
@@ -22,7 +23,7 @@
     ```
 - Setup SSH Config in `~/.ssh/config`. The port listed here is usually correct, though you may want to verify that it is the same as the one listed in the output of `vagrant ssh-config dokku`
 
-    ```
+    ```ini
     Host dokku.me
         Port 22
     ```