Add C# Dev Kit to devcontainer #127

	# This workflow will do a clean installation of node dependencies, cache/restore them, build the source code and run tests across different versions of node
	# For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions

	name: Build a dev container image
	on:
	workflow_dispatch: # Manual trigger
	schedule:
	- cron: "30 17 * * 0"
	push:
	branches:
	- main
	paths:
	- .devcontainer/**
	- .github/workflows/devcontainer.yml

	jobs:
	build-and-push:
	name: Build and push dev container image
	runs-on: ubuntu-latest
	permissions:
	packages: write
	contents: read
	steps:
	- name: Checkout code
	uses: actions/checkout@v3

	- name: Log in to GitHub Docker Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Install Dev Container CLI
	run: npm install -g @devcontainers/cli

	- name: Build and push ghcr.io/sliekens/gw2sdk/devcontainer
	run: devcontainer build --no-cache --image-name ghcr.io/sliekens/gw2sdk/devcontainer --push --workspace-folder .

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