Fix feature path

[titanous]

The /tailscale path suffix is required as it is mapped to the ./src directory in this repo.

Added :1 to pin the major version.

[DentonGentry]

No, this is what we've been working through with:

• Revert "Add Tailscale devcontainer feature (#119)" devcontainers/devcontainers.github.io#127
• Add Tailscale devcontainer feature devcontainers/devcontainers.github.io#119
• Changed namespace, but version tags still appear in original namespace devcontainers/action#147

The namespace has to be ghcr.io/tailscale/codespace for GitHub to list it. They rejected ghcr.io/tailscale/codespace/tailscale

[titanous]

Right, ghcr.io/tailscale/codespace is the namespace but ghcr.io/tailscale/codespace/tailscale is required to make it work in the features list. It's the same at https://github.com/devcontainers/devcontainers.github.io/pull/119/files#diff-213a25c23998b235e92e81da59bbf14a591fa6332ee3d14a662ad4471e621bcbR230

[ostrowr]

Yep, as written in the README doesn't work, but with this change the codespace can be created successfully!

In the docs (https://tailscale.com/kb/1160/github-codespaces/) explain that you should set up your codespace as

    "runArgs": ["--device=/dev/net/tun"],
    "features": {
        // ...
        "ghcr.io/tailscale/codespace/tailscale": {}
        // ...
    }

– this README and those docs should agree!

[raggi]

Fixed in #31 - thank you