Add more details

apps/photos/.env.development

@@ -5,6 +5,10 @@
 # environment variables you need into it. That `.env.local` file will be
 # .gitignored, so you can freely customize how the app runs in your local setup.
 #
+# - `.env.local` is picked up by next when NODE_ENV is development
+#
+# - `.env` is picked up always
+#
 # You don't necessarily need to use these files, these variables can be provided
 # as environment variables when running yarn dev too. e.g.
 #