Repository: flutter
Issue: [Web] make it clear that -d web-server doesn't support debug protocol
Labels: tool,a: debugging,platform-web,P2,team-web,triaged-web

When connecting to code-server with the browser(over ssh) or with vs code I can't start the web server debugger
I can for build web and that works without issues.
When I connect with vs code over ssh, the debug page never stops loading and the Dart debug extension stays gray. I can open the devtools on 9100 port, so port forwarding works.

```
PS C:\Users\mihcs> curl 127.0.0.1:9100


StatusCode        : 200
StatusDescription : OK
Content           : <!DOCTYPE html>

                    <!--
                      Copyright 2018 The Chromium Authors. All rights reserved.
                      Use of this source code is governed by a BSD-style license that can be
                      found in the LICENSE file.
                    -->

                    <html>
                    <hea...
RawContent        : HTTP/1.1 200 OK
                    x-xss-protection: 1; mode=block
                    x-content-type-options: nosniff
                    Accept-Ranges: bytes
                    Content-Length: 5385
                    Cache-Control: max-age=900
                    Content-Type: text/html
                    Date: Tue, 07 Dec 20...
Forms             : {}
Headers           : {[x-xss-protection, 1; mode=block], [x-content-type-options, nosniff], [Accept-Ranges, bytes], [Content-Length, 5385]...}
Images            : {}
InputFields       : {}
Links             : {}
ParsedHtml        : mshtml.HTMLDocumentClass
RawContentLength  : 5385



PS C:\Users\mihcs> curl 127.0.0.1:35731
curl : 404 Not Found
Only WebSocket connections are supported.
At line:1 char:1
+ curl 127.0.0.1:35731
+ ~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (System.Net.HttpWebRequest:HttpWebRequest) [Invoke-WebRequest], WebException
    + FullyQualifiedErrorId : WebCmdletWebResponseException,Microsoft.PowerShell.Commands.InvokeWebRequestCommand
PS C:\Users\mihcs>
```

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## Steps to Reproduce

<!-- Please tell us exactly how to reproduce the problem you are running into. -->

1.  it's set up on an arm64 oracle linux 8 on oracle cloud
2.  just downloaded flutter stable with fvm after downloading the dart sdk
3. latest code-server 3.12 from github

## Logs

<details>
<summary>Logs</summary>

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      with the backticks below. If you are running any "flutter" commands,
      please include the output of running them with "--verbose"; for example,
      the output of running "flutter --verbose create foo".
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```
```

<!-- If possible, paste the output of running `flutter doctor -v` here. -->

```
flutter doctor -v
[✓] Flutter (Channel stable, 2.5.3, on Oracle Linux Server 8.5 5.4.17-2136.301.1.4.el8uek.aarch64, locale
    en_US.UTF-8)
    • Flutter version 2.5.3 at /opt/flutter/stable
    • Upstream repository https://github.com/flutter/flutter.git
    • Framework revision 18116933e7 (8 weeks ago), 2021-10-15 10:46:35 -0700
    • Engine revision d3ea636dc5
    • Dart version 2.14.4

[✗] Chrome - develop for the web (Cannot find Chrome executable at google-chrome)
    ! Cannot find Chrome. Try setting CHROME_EXECUTABLE to a Chrome executable.

[✗] Flutter IDE Support (No supported IDEs installed)
    • IntelliJ - https://www.jetbrains.com/idea/
    • Android Studio - https://developer.android.com/studio/
    • VS Code - https://code.visualstudio.com/

[!] Connected device
    ! No devices available

! Doctor found issues in 3 categories.
```

</details>