Remove golangci-lint as dependecy, use docker

Author: lucacome

Makefile

@@ -16,7 +16,7 @@ nginx-prometheus-exporter:
 
 .PHONY: lint
 lint:
-	go run github.com/golangci/golangci-lint/cmd/golangci-lint run
+	docker run --pull always --rm -v $(shell pwd):/nginx-prometheus-exporter -w /nginx-prometheus-exporter -v $(shell go env GOCACHE):/cache/go -e GOCACHE=/cache/go -e GOLANGCI_LINT_CACHE=/cache/go -v $(shell go env GOPATH)/pkg:/go/pkg golangci/golangci-lint:latest golangci-lint --color always run
 
 .PHONY: test
 test:

go.mod

@@ -3,7 +3,6 @@ module github.com/nginxinc/nginx-prometheus-exporter
 go 1.16
 
 require (
-	github.com/golangci/golangci-lint v1.40.1
 	github.com/nginxinc/nginx-plus-go-client v0.8.0
 	github.com/prometheus/client_golang v1.11.0
 	github.com/prometheus/common v0.29.0