set environment when we deploy website

website/packer.json

@@ -3,6 +3,7 @@
     "aws_access_key_id": "{{ env `AWS_ACCESS_KEY_ID` }}",
     "aws_secret_access_key": "{{ env `AWS_SECRET_ACCESS_KEY` }}",
     "aws_region": "{{ env `AWS_REGION` }}",
+    "website_environment": "production",
     "fastly_api_key": "{{ env `FASTLY_API_KEY` }}"
   },
   "builders": [
@@ -22,6 +23,7 @@
         "AWS_ACCESS_KEY_ID={{ user `aws_access_key_id` }}",
         "AWS_SECRET_ACCESS_KEY={{ user `aws_secret_access_key` }}",
         "AWS_REGION={{ user `aws_region` }}",
+        "ENV={{ user `website_environment` }}",
         "FASTLY_API_KEY={{ user `fastly_api_key` }}"
       ],
       "inline": [