Can't find docs for Phoenix deployment

Hi I just deployed my phoenix app to render.
But I don’t know how to run mix ecto.migrate and some seeds for database.
Where is document for this?
please help

I just found

#!/usr/bin/env bash
# Initial setup
mix deps.get --only prod
MIX_ENV=prod mix compile

# Compile assets
npm install --prefix ./assets
npm run deploy --prefix ./assets
mix phx.digest

# Remove the existing release directory and build the release
rm -rf "_build"
MIX_ENV=prod mix release

# Run migrations
_build/prod/rel/render/bin/render eval "Render.Release.migrate"

and it works but how can I one off command like

mix run priv/repo/seeds.exs