This is a template for creating a dev environment that can be hosted on Render and connected to via SSH. It includes a Dockerfile which installs a bunch of packages that are useful in dev, and starts a dropbear SSH server as a non-root user. To SSH in from outside your Render network, deploy a Tailscale subnet router with the same Render user or team.
Rather than deploying directly, you should create your own repo using this repo as a template and then deploy by clicking the button below.
A forthcoming blog post will provide more detail.