Fix building a docker

[kamenwuk]

Obsidian Version

1.12.x

Please explain what happened

You are missing this line (file Dockerfile)
FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS build

Operating System

Windows (x64)

Operating System Version / Variant?

No response

Confirmation

• I am aware that I am making a GitHub issue for the Obsidian that is a Minecraft server, and not the Obsidian that is a Markdown editor.

[Naamloos]

Thank you for your time, I'll try to resolve the docker image as soon as I get home from work