cmd/dcrdata: Use template func for footer year #1179

	name: Build and Test
	on: [push, pull_request]
	permissions:
	contents: read

	jobs:
	build-go:
	name: Go Build and Test
	runs-on: ubuntu-latest
	strategy:
	matrix:
	go: ['1.20', '1.21']
	steps:
	- uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab #v3.5.2

	- name: Set up Go
	uses: actions/setup-go@fac708d6674e30b6ba41289acaab6d4b75aa0753 #v4.0.1
	with:
	go-version: ${{ matrix.go }}

	- name: Go Build dcrdata
	run: go build -v ./...
	working-directory: ./cmd/dcrdata

	- name: Install Linters
	run: "curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh \| sh -s -- -b $(go env GOPATH)/bin v1.55.2"

	- name: Go Tests
	run: \|
	./run_tests.sh

	build-js:
	name: Build JS
	runs-on: ubuntu-latest
	strategy:
	matrix:
	node-version: [16.x, 18.x]
	steps:
	- uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab #v3.5.2

	- name: Use nodejs ${{ matrix.node-version }}
	uses: actions/setup-node@64ed1c7eab4cce3362f8c340dee64e5eaeef8f7c #v3.6.0
	with:
	node-version: ${{ matrix.node-version }}

	- name: npm clean-install
	run: npm clean-install
	working-directory: ./cmd/dcrdata

	- name: npm run build
	run: \|
	npm run build
	git diff --exit-code views/extras.tmpl
	working-directory: ./cmd/dcrdata

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