fix(cli): If NODE_ENV is not defined then default to production for medusa start (#11325)

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/cli/medusa-cli/src/create-cli.ts

@@ -422,7 +422,7 @@ function buildLocalCommands(cli, isLocalProject) {
           }),
       handler: handlerP(
         getCommandHandler(`start`, (args, cmd) => {
-          process.env.NODE_ENV = process.env.NODE_ENV || `development`
+          process.env.NODE_ENV = process.env.NODE_ENV || `production`
           cmd(args)
           // Return an empty promise to prevent handlerP from exiting early.
           // The development server shouldn't ever exit until the user directly