If you want recaptcha endpoint to work, decrypt dev.exs config with passveil and dump the captcha keyword list into the config under key doma_recaptcha.
So captcha: [secret: "xxx", public: "yyy"] decrypted from secret storage sould become recaptcha: [secret: "xxx", public: "yyy"] in the config. See dev.secret.exs.example for inspiration.
If you want doauth to work, you will need at least :crypto/:secret_key_base variable set under :doma Application meta-environment.
This is a common pattern to get DoAuth working in tests, by the way.
You can configure it in your dev.secret.exs using variable :crypto/:text__secret_key_base. See dev.secret.exs.example for inspiration.
nix develop path:.
./run
./run
Figure it out yourself.