Update build instruction in README.md #46

	# This is a basic workflow to help you get started with Actions

	name: Linux Package

	on: [push, pull_request, workflow_dispatch]

	jobs:
	build:
	runs-on: ubuntu-24.04
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: recursive
	- name: Install build dept.
	run: \|
	sudo apt update
	sudo apt install cmake qt6-base-dev qt6-multimedia-dev
	# for linuxdeploy: https://github.com/AppImage/AppImageKit/wiki/FUSE
	# linuxdeploy-plugin-qt still requires qmake currently: https://github.com/linuxdeploy/linuxdeploy-plugin-qt/issues/156
	sudo add-apt-repository universe
	sudo apt install libfuse2 qmake6
	- name: Get linuxdeploy
	run: \|
	wget https://github.com/linuxdeploy/linuxdeploy/releases/download/continuous/linuxdeploy-x86_64.AppImage
	wget https://github.com/linuxdeploy/linuxdeploy-plugin-qt/releases/download/continuous/linuxdeploy-plugin-qt-x86_64.AppImage
	chmod +x linuxdeploy-*.AppImage
	- name: Build
	working-directory: ./
	run: \|
	cmake -B build .
	cmake --build build -j
	- name: Package
	env:
	QMAKE: /usr/bin/qmake6
	run: \|
	./linuxdeploy-x86_64.AppImage --appdir AppDir -e build/thplayer -d assets/thplayer.desktop -i assets/thplayer.svg --icon-filename thplayer -p qt -o appimage
	mv TouHou_Player*.AppImage thplayer-linux.AppImage
	- name: Upload
	uses: actions/upload-artifact@v4
	with:
	name: Linux-Build
	path: thplayer-linux.AppImage

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