Add support for deployed custom B2B Buyer Portal based on env vars#2626

CNanninga wants to merge 3 commits intobigcommerce:integrations/b2b-makeswiftbigcommerce/catalyst:integrations/b2b-makeswiftfrom

CNanninga:feature/b2b-custom-prod-loaderCNanninga/catalyst:feature/b2b-custom-prod-loaderCopy head branch name to clipboard