When using code-server in Dockerfile to install extensions, the extension source is OpenVSX.

If you cannot find the required extension in the OpenVSX repository, you can try downloading VSIX installation packages from other extension sources. Then use the VSIX package to install the extension in Dockerfile.

# Install from OpenVSX
RUN code-server --install-extension ms-python.python

# Install from local VSIX package
RUN code-server --install-extension /path/to/extension.vsix

1. OpenVSX is an open-source alternative to Microsoft's VS Code Marketplace
2. VSIX packages can be downloaded from various sources including:
   • Microsoft Marketplace
   • GitHub Releases
3. Some extensions may require additional dependencies in the container