chore(docs): reorganize installation docs (#11465)

docs/install/kubernetes.md

@@ -46,7 +46,7 @@ locally in order to log in and manage templates.
 
    The cluster-internal DB URL for the above database is:
 
-   ```console
+   ```shell
    postgres://coder:coder@coder-db-postgresql.coder.svc.cluster.local:5432/coder?sslmode=disable
    ```
 
@@ -57,7 +57,7 @@ locally in order to log in and manage templates.
 
 1. Create a secret with the database URL:
 
-   ```console
+   ```shell
    # Uses Bitnami PostgreSQL example. If you have another database,
    # change to the proper URL.
    kubectl create secret generic coder-db-url -n coder \
@@ -66,7 +66,7 @@ locally in order to log in and manage templates.
 
 1. Add the Coder Helm repo:
 
-   ```console
+   ```shell
    helm repo add coder-v2 https://helm.coder.com/v2
    ```
 
@@ -112,7 +112,7 @@ locally in order to log in and manage templates.
 
 1. Run the following command to install the chart in your cluster.
 
-   ```console
+   ```shell
    helm install coder coder-v2/coder \
        --namespace coder \
        --values values.yaml
@@ -135,7 +135,7 @@ locally in order to log in and manage templates.
 To upgrade Coder in the future or change values, you can run the following
 command:
 
-```console
+```shell
 helm repo update
 helm upgrade coder coder-v2/coder \
   --namespace coder \
@@ -201,8 +201,8 @@ follow the steps below:
 1. Create the certificate as a secret in your Kubernetes cluster, if not already
    present:
 
-```console
-$ kubectl create secret tls postgres-certs -n coder --key="postgres.key" --cert="postgres.crt"
+```shell
+kubectl create secret tls postgres-certs -n coder --key="postgres.key" --cert="postgres.crt"
 ```
 
 1. Define the secret volume and volumeMounts in the Helm chart:
@@ -221,7 +221,7 @@ coder:
 
 1. Lastly, your PG connection URL will look like:
 
-```console
+```shell
 postgres://<user>:<password>@databasehost:<port>/<db-name>?sslmode=require&sslcert=$HOME/.postgresql/postgres.crt&sslkey=$HOME/.postgresql/postgres.key"
 ```