New, Updated Exchange Rates API

So, to get it running on locally and/or Heroku, here are the steps:

1. Clone our fork that has a few patches for version compatibility (Py 3.6, 3.8 and Sanic 2020+) https://github.com/kickstartcoding/exchangeratesapi/

2. Create new shell locally:

    pipenv shell
    pipenv install
   

3. Create a new Heroku app:

    heroku create
    heroku addons:create heroku-postgresql:hobby-dev
    # Add the remote DB url to a local .env file:
    heroku config:get DATABASE_URL -s  > .env
   

4. Ensure the .env file got created correctly:

    cat .env
    # Should see something quite long, starting with: DATABASE_URL=
   

5. Test locally:

    heroku local
   
    curl http://localhost:5000/2020-03-05
    # or
    wget -qO - http://localhost:5000/2020-03-05
   
    # output:
    # {"base":"EUR","date":"2020-03-03","rates":.....
   

6. Launch to heroku:

    git push heroku master
   

Troubleshooting dependency installation

1. Try also:

    pipenv install --skip-lock
    pip install gino==0.8.7 # Ensure older version of Gino ORM is installed
   

2. Try instead of "pipenv install" (in fresh venv):

    pip install -r frozen_requirements.txt