Tech Preview of Docker Desktop for M1 is available for download from the Docker's website. Use the Download button to access the official announcement page.
Docker Desktop 3.0.0 available in the Developer Preview Program runs native on M1 Macs. Register to the program and you're good to go.
Docker Desktop handles the setup and teardown of lightweight VMs in macOS using the Virtualization framework. Built-in enterprise network support allows Docker Desktop to work with choice of VPNs and proxies.