A development container is a running Docker container with a well-defined tool/runtime stack and its prerequisites. You can try out development containers with GitHub Codespaces or Visual Studio Code ...
I open a folder in a devcontainer and it keeps crashing / exiting / the connection keeps failing. [34 ms] Dev Containers 0.447.0 in VS Code 1.111.0 (ce099c1ed25d9eb3076c11e4a280f3eb52b4fbeb).