installext successful, but extensions not installed

[tennox]

After encountering #253, I realized that the installext command doesn't seem to work at all.

FROM codercom/ubuntu-dev:latest

RUN installext \
    msjsdiag.debugger-for-chrome \
    dbaeumer.vscode-eslint \
    burkeholland.simple-react-snippets

Step 2/3 : RUN installext msjsdiag.debugger-for-chrome dbaeumer.vscode-eslint burkeholland.simple-react-snippets ---> Running in 9d568db6ddd7 (node:8) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead. INFO code-server v1.1156-vsc1.33.1 ERROR (node:20) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead. ERROR INFO Found 'msjsdiag.debugger-for-chrome' in the marketplace. INFO
INFO Installing... INFO
INFO Extension 'msjsdiag.debugger-for-chrome' v4.12.1 was successfully installed! INFO

But in VSCode, the extension is not installed:

Sail version: v1.1.0 Code-Server version: 2.1692-vsc1.39.2 e14362f3224c101585a26bf7ee5fa6e3bf425046 x64