rustlings/.devcontainer/devcontainer.json

{
  "image": "mcr.microsoft.com/devcontainers/rust:1",
  "updateContentCommand": ["cargo", "build"],
  "postAttachCommand": ["rustlings", "watch"],
  "remoteEnv": {
    "PATH": "${containerEnv:PATH}:${containerWorkspaceFolder}/target/debug"
  }
}