Readme appears to be outdated

[ChristopherHackett]

I've been taking a look at this project and the development setup steps in the readme seem to be incomplete or outdated.

1. It says "By default this uses a sqlite3 database." however the file to copy has postgress configured.
   localsettings_example.py

# Database config
# When on heroku
if 'dj_database_url' in locals() and dj_database_url.config():
    DATABASES = {}
    DATABASES['default'] = dj_database_url.config()
# When on localhost
else:
    DATABASES = {
        'default': {
            # 'django.db.backends.' +  'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
            'ENGINE': 'django.db.backends.postgresql_psycopg2',
            # Or path to database file if using sqlite3.
            'NAME': 'volunteers',

2. On checkout the folder './logs/does not exist and as a result/manage.py migrate` runs into an error until it has been created

FileNotFoundError: [Errno 2] No such file or directory: '/Users/chackett/dev/code/oss/volunteers/logs/error.log'

3. Not a problem with setup instructions but a problem encountered is needing to bump xhtml2pdf from 0.2.5 to 0.2.6 to resolve reportlab compatibility issue

ImportError: cannot import name 'getStringIO' from 'reportlab.lib.utils' (/Users/chackett/dev/code/oss/volunteers/.venv/lib/python3.10/site-packages/reportlab/lib/utils.py)

4. The getting started says to pip install -r requirements.txt but it seems the dev requirements should be used pip install -r requirements-dev.txt

5. When getting to ./manage.py migrate the following error is encountered

./manage.py migrate
SystemCheckError: System check identified some issues:

ERRORS:
<class 'volunteers.admin.VolunteerTaskAdmin'>: (admin.E108) The value of 'list_display[0]' refers to 'volunteer__user__username', which is not a callable, an attribute of 'VolunteerTaskAdmin', or an attribute or method on 'volunteers.VolunteerTask'.
<class 'volunteers.admin.VolunteerTaskAdmin'>: (admin.E108) The value of 'list_display[1]' refers to 'task__name', which is not a callable, an attribute of 'VolunteerTaskAdmin', or an attribute or method on 'volunteers.VolunteerTask'.

As well as the individual issues above I'm not sure if this is the current dev setup as there is a CI folder with a Dockerfile etc. At this point I'm not going to go further as I might be going down the wrong path.

[piemonkey]

I just saw this. My PR #57 fixes just this :)

I didn't get the errors in 5. though, maybe they've been fixed already?