Updates the official Immich Docker compose file by adding a Tailscale side car so that the Immich server can be shared over the Internet

• Tailscale account with HTTPS Certificates and Funnel enabled
• Tailscale Funnel security policy that allows for resources with tag:container

Example:

"nodeAttrs": [
    {
        "target": ["autogroup:member", "tag:container"],
        "attr":   ["funnel"],
    },
],

• Replace the TS_AUTHKEY with your Tailscale auth key in docker-compose.yml
• Create a .env file based on the example.env configuring the Immich database credentials and upload location
• Run docker compose up