Visual studio code VisualStudio在线容器

我正在尝试使用VisualStudio代码创建远程环境。我想为我的容器创建一个自定义dockerfile。我一直在遵循指南：

我正在使用dockerFile引用（但我也尝试了图像引用）。每次我都会得到相同的默认容器

这是我的.devcontainer.json文件：

{
    "name": "Python 3",
    "context": "..",
    "dockerFile": "Dockerfile",

    // Use 'settings' to set *default* container specific settings.json values on container create. 
    // You can edit these settings after create using File > Preferences > Settings > Remote.
    "settings": { 
        "terminal.integrated.shell.linux": "/bin/bash",
        "python.pythonPath": "/usr/local/bin/python",
        "python.linting.enabled": true,
        "python.linting.pylintEnabled": true,
        "python.linting.pylintPath": "/usr/local/bin/pylint"
    },

    // Use 'appPort' to create a container with published ports. If the port isn't working, be sure
    // your server accepts connections from all interfaces (0.0.0.0 or '*'), not just localhost.
    // "appPort": [ 9000 ],

    // Install flask and any other dependencies
    "postCreateCommand": "sudo pip install -r requirements.txt",

    // Comment out next line to run as root
    "remoteUser": "vscode",

    // Add the IDs of extensions you want installed when the container is created in the array below.
    "extensions": [
        "ms-python.python",
        "quicktype.quicktype"
    ]
}

配置的其余部分似乎正常工作——扩展正常，安装了requirements.txt。但是dockerfile似乎是忽略或错误-但我不知道在哪里可以看到任何错误日志

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我也试着指出这个回购协议：但同样的事情也发生了。该dockerfile指向python:3，该版本应为3.8.1版-但环境中的版本为3.8.0，这是默认映像。

已解决-此功能尚未发布。这一次，文档似乎领先于代码。