MicroPyramid/Django-CRM ? reverse-engineered prompt

Build me an open source CRM I can self host for a startup or a larger team. It should let users manage leads, accounts, contacts, opportunities, support tickets, tasks, and invoices in one place, with a clean web app and a mobile app. I want each company’s data kept separate so one deployment can handle multiple tenants safely, and I want a proper admin side for managing users, roles, and organizations.

Please make it easy to run locally with Docker, include a REST API, and add Swagger or similar docs so the endpoints are easy to explore. The web app should feel modern and simple to use, and the support area should include useful things like ticket tracking, escalations, and a knowledge base. If anything needs current setup details, look up the latest docs online.