Bazarr: Postgresql support - Install psycopg2

[aleksasiriski]

I believe psycopg2 is missing from the Dockerfile for Bazarr.

Bazarr starting...
Traceback (most recent call last):
  File "/app/bazarr/main.py", line 22, in <module>
    from init import *  # noqa E402
  File "/app/bazarr/init.py", line 181, in <module>
    from app.announcements import get_announcements_to_file
  File "/app/bazarr/app/announcements.py", line 13, in <module>
    from app.get_providers import get_enabled_providers
  File "/app/bazarr/app/get_providers.py", line 23, in <module>
    from app.event_handler import event_stream
  File "/app/bazarr/app/event_handler.py", line 3, in <module>
    from .app import socketio
  File "/app/bazarr/app/app.py", line 8, in <module>
    from .database import database
  File "/app/bazarr/app/database.py", line 108, in <module>
    class TableEpisodes(BaseModel):
  File "/app/bazarr/../libs/peewee.py", line 6342, in __new__
    cls._meta.add_field(name, field)
  File "/app/bazarr/../libs/peewee.py", line 6126, in add_field
    field.bind(self.model, field_name, set_attribute)
  File "/app/bazarr/../libs/peewee.py", line 4878, in bind
    self._db_hook(model._meta.database)
  File "/app/bazarr/../libs/peewee.py", line 4870, in _db_hook
    self._constructor = database.get_binary_type()
  File "/app/bazarr/../libs/peewee.py", line 4017, in get_binary_type
    return psycopg2.Binary
AttributeError: 'NoneType' object has no attribute 'Binary'

Here''s an example of a correct Dockerfile