remote containersの初期位置

デフォルトだと/workspacesなので、DockerfileのWORKDIRとズレてて「あれ?」ってなる場合が多いと思われるので注意

設定箇所は.devcontainer/devcontainer.jsonworkspaceFolder

 // The optional 'workspaceFolder' property is the path VS Code should open by default when
    // connected. This is typically a file mount in .devcontainer/docker-compose.yml
    "workspaceFolder": "/app/",