docs: migrate README.md to a website (#1094)

Make a website https://golangci-lint.run
for golangci-lint documentation.
The website is backed by Gatsby static site generator
and deployed into Netlify.

Author: jirfag

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,3 +1 @@
 Thank you for the pull request!
-
-Please make sure you didn't directly change `README.md`: it should be changed only by changing `README.tmpl.md` and running `make README.md`.

.gitignore

@@ -13,3 +13,4 @@
 /tools/svg-term
 /.vscode/
 *.test
+.DS_Store

CHANGELOG.md

@@ -2,13 +2,14 @@ Follow the news and releases on our [twitter](https://twitter.com/golangci) and
 There is the most valuable changes log:
 
 ### May 2020
+
 1. Add new linters: `nolintlint`, `goerr113`
-2. Updated linters: `godot`
+2. Updated linters: `godot`, `staticcheck`
 
 ### April 2020
 
 1. Add new linters: `testpackage`, `nestif`, `godot`, `gomodguard`, `asciicheck`
-2. Add  github actions output format
+2. Add github actions output format
 3. Update linters: `wsl`, `gomodguard`, `gosec`
 4. Support `disabled-tags` setting for `gocritic`
 5. Mitigate OOM and "failed prerequisites"
@@ -63,4 +64,4 @@ There is the most valuable changes log:
 7. Support `--color` option
 8. Update x/tools to fix c++ issues
 9. Include support for log level
-10. Sort linters list in help commands
+10. Sort linters list in help commands

Makefile

@@ -1,8 +1,6 @@
 .DEFAULT_GOAL = test
 .PHONY: FORCE
 
-# enable module support across all go commands.
-export GO111MODULE = on
 # enable consistent Go 1.12/1.13 GOPROXY behavior.
 export GOPROXY = https://proxy.golang.org
 
@@ -42,14 +40,11 @@ test_linters:
 
 # Maintenance
 
-generate: README.md assets/demo.svg install.sh assets/github-action-config.json
+generate: install.sh assets/github-action-config.json
 .PHONY: generate
 
-fast_generate: README.md
-.PHONY: fast_generate
-
 maintainer-clean: clean
-	rm -rf assets/demo.svg README.md install.sh
+	rm -rf install.sh
 .PHONY: maintainer-clean
 
 check_generated:
@@ -58,12 +53,6 @@ check_generated:
 	git diff --exit-code # check no changes
 .PHONY: check_generated
 
-fast_check_generated:
-	$(MAKE) --always-make fast_generate
-	git checkout -- go.mod go.sum # can differ between go1.12 and go1.13
-	git diff --exit-code # check no changes
-.PHONY: fast_check_generated
-
 release: .goreleaser.yml tools/goreleaser
 	./tools/goreleaser
 .PHONY: release
@@ -85,22 +74,22 @@ tools/goreleaser: export GOFLAGS = -mod=readonly
 tools/goreleaser: tools/go.mod tools/go.sum
 	cd tools && go build github.com/goreleaser/goreleaser
 
+# TODO: migrate to docs/
 tools/svg-term: tools/package.json tools/package-lock.json
 	cd tools && npm ci
 	ln -sf node_modules/.bin/svg-term $@
 
+# TODO: migrate to docs/
 tools/Dracula.itermcolors:
 	curl -fL -o $@ https://raw.githubusercontent.com/dracula/iterm/master/Dracula.itermcolors
 
+# TODO: migrate to docs/
 assets/demo.svg: tools/svg-term tools/Dracula.itermcolors
 	./tools/svg-term --cast=183662 --out assets/demo.svg --window --width 110 --height 30 --from 2000 --to 20000 --profile ./tools/Dracula.itermcolors --term iterm2
 
 install.sh: .goreleaser.yml tools/godownloader
 	./tools/godownloader .goreleaser.yml | sed '/DO NOT EDIT/s/ on [0-9TZ:-]*//' > $@
 
-README.md: FORCE golangci-lint
-	go run ./scripts/gen_readme/main.go
-
 assets/github-action-config.json: FORCE golangci-lint
 	go run ./scripts/gen_github_action_config/main.go $@