Make it easier to build and investigate images akin to production

Production images are built using buildx which can result in slightly
different images compared to running docker build and docker compose build

elifesciences/issues#9138

Makefile

@@ -3,7 +3,9 @@ dev: bring-up-app-and-queue-watcher
 	docker compose --file docker-compose.yaml --file docker-compose.dev.yaml logs --follow
 
 .PHONY: prod
-prod: bring-up-app-and-queue-watcher
+prod: config.php
+	docker compose --file docker-compose.yaml --file docker-compose.prod.yaml build
+	docker compose --file docker-compose.yaml --file docker-compose.prod.yaml up --wait
 	docker compose --file docker-compose.yaml --file docker-compose.prod.yaml logs --follow
 
 .PHONY: bring-up-app-and-queue-watcher