build(deps): bump docker/build-push-action from 5 to 6 #1011

	name: Build Backend
	on:
	pull_request:
	paths:
	- 'backend/cmd/**'
	- 'backend/pkg/**'
	- 'backend/tools/**'
	- 'backend/test/**'
	- 'backend/go.mod'
	- 'backend/go.sum'
	- 'updaters/**'
	- '.github/**'
	- Makefile

	jobs:

	build:
	name: Lint & Build
	runs-on: ubuntu-22.04

	steps:

	- name: Set up Go 1.21
	uses: actions/setup-go@cdcb36043654635271a94b9a6d1392de5bb323a7 # v5.0.1
	with:
	go-version: 1.21.x
	id: go

	- name: Check out code
	uses: actions/checkout@44c2b7a8a4ea60a981eaca3cf939b5f4305c123b # v4.1.5

	- name: Build, Lint & Check
	run: \|
	make all ci
	working-directory: backend

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