Update generated website Makefile

website/Makefile

+######################################################
+# NOTE: This file is managed by the Digital Team's   #
+# Terraform configuration @ hashicorp/mktg-terraform #
+######################################################
+
 .DEFAULT_GOAL := website
 
+# Set the preview mode for the website shell to "developer" or "io"
+PREVIEW_MODE ?= developer
+REPO ?= nomad
+
 # Enable setting alternate docker tool, e.g. 'make DOCKER_CMD=podman'
 DOCKER_CMD ?= docker
 
+CURRENT_GIT_BRANCH=$$(git rev-parse --abbrev-ref HEAD)
+LOCAL_CONTENT_DIR=
 PWD=$$(pwd)
+
 DOCKER_IMAGE="hashicorp/dev-portal"
 DOCKER_IMAGE_LOCAL="dev-portal-local"
 DOCKER_RUN_FLAGS=-it \
@@ -16,9 +28,12 @@ DOCKER_RUN_FLAGS=-it \
 		--volume "$(PWD)/redirects.js:/app/redirects.js" \
 		--volume "next-dir:/app/website-preview/.next" \
 		--volume "$(PWD)/.env:/app/.env" \
-		-e "REPO=nomad" \
-		-e "PREVIEW_MODE=io"
-
+		-e "REPO=$(REPO)" \
+		-e "PREVIEW_FROM_REPO=$(REPO)" \
+		-e "IS_CONTENT_PREVIEW=true" \
+		-e "LOCAL_CONTENT_DIR=$(LOCAL_CONTENT_DIR)" \
+		-e "CURRENT_GIT_BRANCH=$(CURRENT_GIT_BRANCH)" \
+		-e "PREVIEW_MODE=$(PREVIEW_MODE)"
 
 # Default: run this if working on the website locally to run in watch mode.
 .PHONY: website