Darwin arm64 (#8399)

* Use sed instead of gnu find flags

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Support building linux/amd64 on darin/arm64

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Upgrade awesome_bot to dkhamsing/awesome_bot:1.20.0

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Favor find -prune for vendor

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Skip golang modcache folder

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Favor find -prune for changelog

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Ignore Changelogs of any case

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Fix service-l7 link

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Fix route53-mapper link

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Update rootfs contents description

The auxiliary scripts were removed after:
ab8349008a/rootfs/ingress-controller

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Update paths for modsecurity

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Update paths for modsecurity_snippet

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Update toc for 20190815-zone-aware-routing.md

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Use Internet Archive for datapath.io blog entry

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Use Internet Archive for cloudflare.com help center entry

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

* Use https for nginx.org

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>

Co-authored-by: Josh Soref <jsoref@users.noreply.github.com>

Makefile

@@ -49,6 +49,10 @@ ifeq ($(ARCH),)
     $(error mandatory variable ARCH is empty, either set it when calling the command or make sure 'go env GOARCH' works)
 endif
 
+ifneq ($(PLATFORM),)
+	PLATFORM_FLAG="--platform"
+endif
+
 REGISTRY ?= gcr.io/k8s-staging-ingress-nginx
 
 BASE_IMAGE ?= k8s.gcr.io/ingress-nginx/nginx:5402d35663917ccbbf77ff48a22b8c6f77097f48@sha256:ec8a104df307f5c6d68157b7ac8e5e1e2c2f0ea07ddf25bb1c6c43c67e351180
@@ -62,6 +66,7 @@ help:  ## Display this help
 image: clean-image ## Build image for a particular arch.
 	echo "Building docker image ($(ARCH))..."
 	@docker build \
+		${PLATFORM_FLAG} ${PLATFORM} \
 		--no-cache \
 		--build-arg BASE_IMAGE="$(BASE_IMAGE)" \
 		--build-arg VERSION="$(TAG)" \
@@ -143,10 +148,11 @@ vet:
 
 .PHONY: check_dead_links
 check_dead_links: ## Check if the documentation contains dead links.
-	@docker run -t \
-	  -v $$PWD:/tmp aledbf/awesome_bot:0.1 \
+	@docker run ${PLATFORM_FLAG} ${PLATFORM} -t \
+	  -w /tmp \
+	  -v $$PWD:/tmp dkhamsing/awesome_bot:1.20.0 \
 	  --allow-dupe \
-	  --allow-redirect $(shell find $$PWD -mindepth 1 -name "*.md" -printf '%P\n' | grep -v vendor | grep -v Changelog.md)
+	  --allow-redirect $(shell find $$PWD -mindepth 1 -name vendor -prune -o -name .modcache -prune -o -iname Changelog.md -prune -o -name "*.md" | sed -e "s#$$PWD/##")
 
 .PHONY: dev-env
 dev-env:  ## Starts a local Kubernetes cluster using kind, building and deploying the ingress controller.
@@ -158,8 +164,8 @@ dev-env-stop: ## Deletes local Kubernetes cluster created by kind.
 
 .PHONY: live-docs
 live-docs: ## Build and launch a local copy of the documentation website in http://localhost:8000
-	@docker build -t ingress-nginx-docs .github/actions/mkdocs
-	@docker run --rm -it \
+	@docker build ${PLATFORM_FLAG} ${PLATFORM} -t ingress-nginx-docs .github/actions/mkdocs
+	@docker run ${PLATFORM_FLAG} ${PLATFORM} --rm -it \
 		-p 8000:8000 \
 		-v ${PWD}:/docs \
 		--entrypoint mkdocs \