add build instructions

.devcontainer/Dockerfile

@@ -0,0 +1,3 @@
+FROM --platform=linux/linux/amd64 rayproject/ray:nightly-py38-gpu
+FROM mcr.microsoft.com/vscode/devcontainers/repos/microsoft/vscode:branch-main
+

README.md

@@ -3,6 +3,9 @@
 [![Bugs](https://img.shields.io/github/issues/microsoft/vscode/bug.svg)](https://github.com/microsoft/vscode/issues?utf8=✓&q=is%3Aissue+is%3Aopen+label%3Abug)
 [![Gitter](https://img.shields.io/badge/chat-on%20gitter-yellow.svg)](https://gitter.im/Microsoft/vscode)
 
+## ANYSCALE IMAGE
+To build read the instruction in `build-anyscale-server.sh` and then run it.
+
 ## The Repository
 
 This repository ("`Code - OSS`") is where we (Microsoft) develop the [Visual Studio Code](https://code.visualstudio.com) product together with the community. Not only do we work on code and issues here, we also publish our [roadmap](https://github.com/microsoft/vscode/wiki/Roadmap), [monthly iteration plans](https://github.com/microsoft/vscode/wiki/Iteration-Plans), and our [endgame plans](https://github.com/microsoft/vscode/wiki/Running-the-Endgame). This source code is available to everyone under the standard [MIT license](https://github.com/microsoft/vscode/blob/main/LICENSE.txt).

build-anyscale-server.sh

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+# export DOCKER_DEFAULT_PLATFORM=linux/amd64
+# cd .devcontainer
+# docker build . -t vscode-rayml
+# docker run -v /Users/sofian/src:/home/ray --platform=linux/amd64 vscode-rayml
+yarn
+yarn gulp vscode-reh-web-linux-x64-min
+tar -czf vscode-server-anyscale.tar ../vscode-reh-web-linux-x64