Update alpine Docker tag to v3.19 #20

	name: Go

	on: [push]

	jobs:

	build:
	name: Build
	runs-on: ubuntu-latest
	steps:

	- name: Set up Go 1.21
	uses: actions/setup-go@v4
	with:
	go-version: 1.21
	id: go

	- name: Check out code into the Go module directory
	uses: actions/checkout@v4

	- name: Build
	run: go build -v .

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