Email-Dashboard/Email-Marketing ? reverse-engineered prompt

Build me a Dockerized Ruby on Rails app for email marketing and a lightweight CRM.

I want a simple dashboard where I can import contacts from CSV, add tags and custom fields, filter people by things like tags or past campaign activity, and then create email campaigns from those filtered results. The app should let me make reusable email templates, send emails through a provider like SendGrid or AWS SES, and show basic campaign stats so I can see what was sent and how it performed.

I also want an inbox style area where I can view incoming emails, match them to users or campaigns, archive or delete messages, add tags, and send quick template replies. Make it feel polished and easy to use, with the main flows focused on managing contacts, building campaigns, and tracking results. If you need to look up current docs online while setting it up, go ahead.