Setup the app locally with just one command: just contribute

[gerhard]

Given a new Mac, this is the simplest way to setup the app locally 👋 hi contributors

1. You will need to have brew installed
2. Install just via brew install just
3. In your local copy of the app repository, run: just contribute

This is what you can expect to happen:

changelog-just-contribute.mp4

---

All available commands:

❯ just
just --list
Available recipes:
    contribute    # Setup everything needed for your first contribution
    deps          # Install app dependencies
    dev           # Run app in dev mode
    local         # Install all system dependencies
    postgres-down # Stop Postgres server
    postgres-up   # Start Postgres server
    test          # Run app tests