docs: add usage in Coder (#5975)

* docs: add difference between Coder

Add a short block explaining the difference between code-server and
Coder.

* docs: add new doc coder.md under Install

This adds a new doc explaining how to install code-server in a Coder
workspace using Terraform.

docs/FAQ.md

@@ -26,6 +26,7 @@
 - [Is multi-tenancy possible?](#is-multi-tenancy-possible)
 - [Can I use Docker in a code-server container?](#can-i-use-docker-in-a-code-server-container)
 - [How do I disable telemetry?](#how-do-i-disable-telemetry)
+- [What's the difference between code-server and Coder?](#whats-the-difference-between-code-server-and-coder)
 - [What's the difference between code-server and Theia?](#whats-the-difference-between-code-server-and-theia)
 - [What's the difference between code-server and OpenVSCode-Server?](#whats-the-difference-between-code-server-and-openvscode-server)
 - [What's the difference between code-server and GitHub Codespaces?](#whats-the-difference-between-code-server-and-github-codespaces)
@@ -363,6 +364,15 @@ Use the `--disable-telemetry` flag to disable telemetry.
 
 > We use the data collected only to improve code-server.
 
+## What's the difference between code-server and Coder?
+
+code-server and Coder are both applications that can be installed on any
+machine. The main difference is who they serve. Out of the box, code-server is
+simply VS Code in the browser while Coder is a tool for provisioning remote
+development environments via Terraform.
+
+code-server was built for individuals while Coder was built for teams. In Coder, you create Workspaces which can have applications like code-server. If you're looking for a team solution, you should reach for [Coder](https://github.com/coder/coder).
+
 ## What's the difference between code-server and Theia?
 
 At a high level, code-server is a patched fork of VS Code that runs in the

docs/coder.md

+# Coder
+
+To install and run code-server in a Coder workspace, we suggest using the `install.sh`
+script in your template like so:
+
+```terraform
+resource "coder_agent" "dev" {
+  arch           = "amd64"
+  os             = "linux"
+  startup_script = <<EOF
+    #!/bin/sh
+    set -x
+    # install and start code-server
+    curl -fsSL https://code-server.dev/install.sh | sh -s -- --version 4.8.3
+    code-server --auth none --port 13337 &
+    EOF
+}
+
+resource "coder_app" "code-server" {
+  agent_id     = coder_agent.dev.id
+  slug         = "code-server"
+  display_name = "code-server"
+  url          = "http://localhost:13337/"
+  icon         = "/icon/code.svg"
+  subdomain    = false
+  share        = "owner"
+
+  healthcheck {
+    url       = "http://localhost:13337/healthz"
+    interval  = 3
+    threshold = 10
+  }
+}
+```
+
+If you run into issues, ask for help on the `coder/coder` [Discussions
+here](https://github.com/coder/coder/discussions).

docs/manifest.json

@@ -37,6 +37,11 @@
       "icon_path": "assets/images/icons/usage.svg",
       "path": "./guide.md",
       "children": [
+        {
+          "title": "Coder",
+          "description": "How to run code-server in Coder",
+          "path": "./coder.md"
+        },
         {
           "title": "--link",
           "description": "How to run code-server --link",