fix: Update go version #80

	name: Backend CI/CD

	on:
	push:
	branches:
	- master
	paths-ignore:
	- frontend/**
	- .github/workflows/frontend.yml
	- docs/**
	- README.md
	- .gitignore
	workflow_dispatch:

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	- uses: actions/setup-go@v5
	with:
	go-version: '>=1.21.3'
	- run: go version
	- name: Generate code
	run: go generate github.com/kuzznya/letsdeploy/...
	- name: Run tests
	run: go test github.com/kuzznya/letsdeploy/...
	- name: Build image
	run: docker build -t ghcr.io/kuzznya/letsdeploy/backend:latest .
	- name: Login with docker
	run: >
	echo ${{ secrets.GITHUB_TOKEN }} \| docker login --username kuzznya
	--password-stdin ghcr.io/kuzznya
	- name: Publish container
	run: docker push ghcr.io/kuzznya/letsdeploy/backend:latest

	deploy:
	needs: build
	runs-on: ubuntu-latest
	steps:
	- name: Prepare .kube directory
	run: mkdir ~/.kube \|\| echo "Cannot create ~/.kube directory, skipping"
	- name: Prepare kubeconfig
	run: echo "${{ secrets.KUBECONFIG }}" > ~/.kube/config
	- name: Deploy to Kubernetes
	run: kubectl rollout restart deployment backend --namespace letsdeploy

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