add binary build workflow #7

	name: Cross-Platform Build on New Tag

	on:
	pull_request:
	push:
	tags:
	- '*'

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	include:
	- os: linux
	arch: amd64
	# Uncomment and add other OS and architecture combinations as needed
	# - os: linux
	# arch: arm64
	# - os: darwin
	# arch: amd64
	# - os: darwin
	# arch: arm64
	# - os: windows
	# arch: amd64
	# - os: windows
	# arch: 386
	# - os: freebsd
	# arch: amd64
	# - os: freebsd
	# arch: arm
	env:
	BUILDOS: ${{ matrix.os }}
	BUILDARCH: ${{ matrix.arch }}
	BINARY_NAME: cryptopower-${{ matrix.os }}-${{ matrix.arch }}
	steps:
	- uses: actions/checkout@v2

	- name: Copy instantswap file
	run: cp ./libwallet/instantswap/instant_example.json ./libwallet/instantswap/instant.json

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Build and push
	uses: docker/build-push-action@v2
	with:
	context: .
	file: ./reproduciblebuilds/Dockerfile
	load: true
	platforms: ${{ matrix.os }}/${{ matrix.arch }}
	push: false
	tags: user/app:latest
	build-args: \|
	BUILDOS=${{ env.BUILDOS }}
	BUILDARCH=${{ env.BUILDARCH }}
	BUILDNAME=${{ env.BINARY_NAME }}

	- name: Create Container and Copy Binary
	run: \|
	docker create --name temp-container user/app:latest
	docker cp temp-container:/app/${{ env.BINARY_NAME }} ./${{ env.BINARY_NAME }}
	docker rm temp-container

	- name: Upload Binary
	uses: actions/upload-artifact@v2
	with:
	name: ${{ env.BINARY_NAME }}
	path: ./${{ env.BINARY_NAME }}

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