docs: consolidate docker quickstarts (#4882)

docs/quickstart/docker.md

@@ -13,34 +13,41 @@ Coder with Docker has the following advantages:
 
 ## Instructions
 
-1.  [Install and launch Coder](../install)
+1. Run Coder with Docker.
 
-    The Coder server binds to port 3000 by default. Use `--address :<port>` to customize it!
+    ```shell
+    export CODER_DATA=$HOME/.config/coderv2-docker
+    export DOCKER_GROUP=$(getent group docker | cut -d: -f3)
+    mkdir -p $CODER_DATA
+    docker run --rm -it \
+        -v $CODER_DATA:/home/coder/.config \
+        -v /var/run/docker.sock:/var/run/docker.sock \
+        --group-add $DOCKER_GROUP \
+        ghcr.io/coder/coder:latest
+    ```
+    
+    > This will use Coder's tunnel and built-in database. See our [Docker documentation](../install/docker.md) for other configuration options such as running on localhost, using docker-compose, and external PostgreSQL.
 
-    Use the [Coder tunnel](../admin/configure.md#tunnel) for a public URL:
 
-    ```bash
-    coder server
+1.  In new terminal, [install Coder](../install/) in order to connect to your deployment through the CLI.
+
+    ```shell
+    curl -L https://coder.com/install.sh | sh
     ```
 
-    Or set an [access URL](../admin/configure.md#access-url) to run entirely locally:
-
-    ```bash
-    coder server --access-url=http://localhost:3000 --address=:3000
-    ```
-
-1.  Run `coder login <access url>` in a new terminal and follow the
+1.  Run `coder login <access url>` and follow the
     interactive instructions to create your user.
 
 1.  Pull the "Docker" example template using the interactive `coder templates init`:
 
-    ```bash
+    ```shell
     coder templates init
     cd docker
     ```
 
 1.  Push up the template with `coder templates create`
-1.  Open the dashboard in your browser (http://localhost:3000) to create your
+
+1.  Open the dashboard in your browser to create your
     first workspace:
 
     <img src="../images/quickstart/docker/login.png">