shynet: SQLite not working

I tried setting up a local instance of shynet, to test it, but the setup with SQLite did not work. I uncommented the sqlite settings in the .env template file and commented the postgres settings. I tried the command mentioned in the setup guide (docker run --env-file=.env milesmcc/shynet), which threw an error:

Performing startup checks...
Running migrations (setting up DB)...
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 219, in ensure_connection
    self.connect()
  File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 33, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 200, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 33, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/sqlite3/base.py", line 209, in get_new_connection
    conn = Database.connect(**conn_params)
sqlite3.OperationalError: unable to open database file

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/shynet/./manage.py", line 21, in <module>
    main()
  File "/usr/src/shynet/./manage.py", line 17, in main
    execute_from_command_line(sys.argv)
  File "/usr/local/lib/python3.10/site-packages/django/core/management/__init__.py", line 419, in execute_from_command_line
    utility.execute()
  File "/usr/local/lib/python3.10/site-packages/django/core/management/__init__.py", line 413, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/usr/local/lib/python3.10/site-packages/django/core/management/base.py", line 354, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/usr/local/lib/python3.10/site-packages/django/core/management/base.py", line 398, in execute
    output = self.handle(*args, **options)
  File "/usr/local/lib/python3.10/site-packages/django/core/management/base.py", line 89, in wrapped
    res = handle_func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/core/management/commands/migrate.py", line 92, in handle
    executor = MigrationExecutor(connection, self.migration_progress_callback)
  File "/usr/local/lib/python3.10/site-packages/django/db/migrations/executor.py", line 18, in __init__
    self.loader = MigrationLoader(self.connection)
  File "/usr/local/lib/python3.10/site-packages/django/db/migrations/loader.py", line 53, in __init__
    self.build_graph()
  File "/usr/local/lib/python3.10/site-packages/django/db/migrations/loader.py", line 220, in build_graph
    self.applied_migrations = recorder.applied_migrations()
  File "/usr/local/lib/python3.10/site-packages/django/db/migrations/recorder.py", line 77, in applied_migrations
    if self.has_table():
  File "/usr/local/lib/python3.10/site-packages/django/db/migrations/recorder.py", line 55, in has_table
    with self.connection.cursor() as cursor:
  File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 33, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 259, in cursor
    return self._cursor()
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 235, in _cursor
    self.ensure_connection()
  File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 33, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 218, in ensure_connection
    with self.wrap_database_errors:
  File "/usr/local/lib/python3.10/site-packages/django/db/utils.py", line 90, in __exit__
    raise dj_exc_value.with_traceback(traceback) from exc_value
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 219, in ensure_connection
    self.connect()
  File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 33, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/base/base.py", line 200, in connect
    self.connection = self.get_new_connection(conn_params)
  File "/usr/local/lib/python3.10/site-packages/django/utils/asyncio.py", line 33, in inner
    return func(*args, **kwargs)
  File "/usr/local/lib/python3.10/site-packages/django/db/backends/sqlite3/base.py", line 209, in get_new_connection
    conn = Database.connect(**conn_params)
django.db.utils.OperationalError: unable to open database file
Migrations failed, exiting

It threw the same error without mounting the folder with the database file into the container, and it also failed with mounting the database file directly (./database/db.sqlite3:/var/local/shynet/db/db.sqlite3:rw)

This docker-compose, which should do the same if I’m not mistaken, did also fail with the same error

version: "3.0"
services:
  shynet:
    image: milesmcc/shynet
    container_name: shynet
    restart: unless-stopped
    ports:
      - 8080:8080
    volumes:
      - ./database/db.sqlite3:/var/local/shynet/db/db.sqlite3:rw
    env_file: .env

I have no idea where the problem could be, because I don’t know how django handles databases.