Add super-linter + fix lint issues (#650)

* feat: bump `golangci-lint`, add `super-linter`, replace outdated linter

Bump `golangci-lint` version.
Add `super-linter` to lint other languages.
Go linter is disabled because it's currently broken:
https://github.com/github/super-linter/pull/370
Replacing `scopelint` with `exportloopref`: "[runner] The linter
'scopelint' is deprecated (since v1.39.0) due to: The repository of the
linter has been deprecated by the owner.  Replaced by exportloopref."
Fixed formatting in `.golangci.yml`
Add addtional linters:
  `misspell`: purely style, detects typos in comments
  `whitespace`: detects leading and trailing whitespace
  `goimports`: it's gofmt + checks unused imports

* fix: lint/fix `go` files

* fix: lint with `standardjs`

* fix: lint/fix with `markdownlint`, make template more verbose

* feat: add lint stuff to makefile

* fix: `UseGitIgnore` formatting

* fix: lint/fix `README.md`

Co-authored-by: Casey Lee <cplee@nektos.com>

Makefile

@@ -6,8 +6,17 @@ MINOR_VERSION = $(word 2, $(subst ., ,$(VERSION)))
 PATCH_VERSION = $(word 3, $(subst ., ,$(word 1,$(subst -, , $(VERSION)))))
 NEW_VERSION ?= $(MAJOR_VERSION).$(MINOR_VERSION).$(shell echo $$(( $(PATCH_VERSION) + 1)) )
 
+fix = false
+ifeq (true,$(fix))
+	FIX = --fix
+endif
+
 ACT ?= go run main.go
-export GITHUB_TOKEN := $(shell cat ~/.config/github/token)
+
+HAS_TOKEN = $(if $(test -e ~/.config/github/token),true,false)
+ifeq (true,$(HAS_TOKEN))
+	export GITHUB_TOKEN := $(shell cat ~/.config/github/token)
+endif
 
 .PHONY: build
 build:
@@ -22,6 +31,42 @@ test:
 	go test ./...
 	$(ACT)
 
+.PHONY: lint-go
+lint-go:
+	golangci-lint run $(FIX)
+
+.PHONY: lint-js
+lint-js:
+	standard $(FIX)
+
+.PHONY: lint-md
+lint-md:
+	markdownlint . $(FIX)
+
+.PHONY: lint-rest
+lint-rest:
+	docker run --rm -it \
+		-e 'RUN_LOCAL=true' \
+		-e 'FILTER_REGEX_EXCLUDE=.*testdata/*' \
+		-e 'VALIDATE_BASH=false' \
+		-e 'VALIDATE_DOCKERFILE=false' \
+		-e 'VALIDATE_DOCKERFILE_HADOLINT=false' \
+		-e 'VALIDATE_GO=false' \
+		-e 'VALIDATE_JSCPD=false' \
+		-e 'VALIDATE_SHELL_SHFMT=false' \
+		-v $(PWD):/tmp/lint \
+		github/super-linter
+
+.PHONY: lint
+lint: lint-go lint-rest
+
+.PHONY: lint-fix
+lint-fix: lint-md lint-go
+
+.PHONY: fix
+fix:
+	make lint-fix fix=true
+
 .PHONY: install
 install: build
 	@cp dist/local/act $(PREFIX)/bin/act