Readme appears to be outdated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I've been taking a look at this project and the development setup steps in the readme seem to be incomplete or outdated.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