On Visual Studio Code devcontainer rebuild: keep VSC plugins?
Figured it out by myself.
There is the .devcontainer/devcontainer.json file which contains following section:
// Add the IDs of extensions you want installed when the container is created. "extensions": [ "ms-python.python", "ms-python.vscode-pylance", "littlefoxteam.vscode-python-test-adapter" ],The ID of an extension can be found on the introduction screen after installing it.