CI Revamp by @crazy-max (#1873)

* CI revamped and other enhancements
GoReleaser for multi-arch binaries
Switch to GitHub Actions (more versatile) with 2 workflows
Docker multi-manifest image with buildx
Fix eslint run script
Go sum fixer
Use tools.go paradigm for external dependencies (packr)
Use go generate for packr

* Update workflows
* Add Slack notification
* Rebase
* Enhanced Dockerfile
* Fix go generate
* Fix Golangci lint
* Fix npm cache with v2 cache action
* Fix Dockerfile
* Trigger notif
* Issue with packr
* s390x platform not supported by packr
* Enhance layers
* Fix go modules

Co-authored-by: CrazyMax <crazy-max@users.noreply.github.com>

Makefile

@@ -1,43 +0,0 @@
-GIT_VERSION := $(shell git describe --abbrev=4 --dirty --always --tags)
-NATIVE_GOOS = $(shell unset GOOS; go env GOOS)
-NATIVE_GOARCH = $(shell unset GOARCH; go env GOARCH)
-GOPATH := $(shell go env GOPATH)
-JSFILES = $(shell find client -path client/node_modules -prune -o -type f -name '*.js')
-STATIC = build/static/index.html
-CHANNEL ?= release
-DOCKER_IMAGE_DEV_NAME=adguardhome-dev
-DOCKERFILE=packaging/docker/Dockerfile
-DOCKERFILE_HUB=packaging/docker/Dockerfile.travis
-
-TARGET=AdGuardHome
-
-.PHONY: all build clean
-all: build
-
-build: $(TARGET)
-
-client/node_modules: client/package.json client/package-lock.json
-	npm --prefix client ci
-	touch client/node_modules
-
-$(STATIC): $(JSFILES) client/node_modules
-	npm --prefix client run build-prod
-
-$(TARGET): $(STATIC) *.go home/*.go dhcpd/*.go dnsfilter/*.go dnsforward/*.go
-	GOOS=$(NATIVE_GOOS) GOARCH=$(NATIVE_GOARCH) GO111MODULE=off go get -v github.com/gobuffalo/packr/...
-	PATH=$(GOPATH)/bin:$(PATH) packr -z
-	CGO_ENABLED=0 go build -ldflags="-s -w -X main.version=$(GIT_VERSION) -X main.channel=$(CHANNEL) -X main.goarm=$(GOARM)" -asmflags="-trimpath=$(PWD)" -gcflags="-trimpath=$(PWD)"
-	PATH=$(GOPATH)/bin:$(PATH) packr clean
-
-docker:
-	docker build -t "$(DOCKER_IMAGE_DEV_NAME)" -f "$(DOCKERFILE)" .
-	@echo Now you can run the docker image:
-	@echo docker run --name "$(DOCKER_IMAGE_DEV_NAME)" -p 53:53/tcp -p 53:53/udp -p 80:80/tcp -p 443:443/tcp -p 853:853/tcp -p 3000:3000/tcp $(DOCKER_IMAGE_DEV_NAME)
-
-clean:
-	$(MAKE) cleanfast
-	rm -rf build
-	rm -rf client/node_modules
-
-cleanfast:
-	rm -f $(TARGET)