Error logged to console when opening updater page

[migus-rs]

Describe the bug
When opening the updater page (http://embark.local/updater/) the console shows the following error complaining about a missing log file:

2026-04-14 13:06:43,103 ERROR Exception inside application: [Errno 2] No such file or directory: '/var/www/emba_logs/emba_update.log'
Traceback (most recent call last):
  File "/var/www/.venv/lib/python3.12/site-packages/channels/routing.py", line 48, in __call__
    return await application(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/sessions.py", line 44, in __call__
    return await self.inner(dict(scope, cookies=cookies), receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/sessions.py", line 261, in __call__
    return await self.inner(wrapper.scope, receive, wrapper.send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/auth.py", line 185, in __call__
    return await super().__call__(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/middleware.py", line 24, in __call__
    return await self.inner(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/routing.py", line 118, in __call__
    return await application(
           ^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/consumer.py", line 95, in app
    return await consumer(scope, receive, send)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/.venv/lib/python3.12/site-packages/channels/consumer.py", line 58, in __call__
    await await_many_dispatch(
  File "/var/www/.venv/lib/python3.12/site-packages/channels/utils.py", line 50, in await_many_dispatch
    await dispatch(result)
  File "/var/www/.venv/lib/python3.12/site-packages/channels/consumer.py", line 74, in dispatch
    await handler(message)
  File "/var/www/.venv/lib/python3.12/site-packages/channels/generic/websocket.py", line 180, in websocket_connect
    await self.connect()
  File "/var/www/embark/embark/logviewer.py", line 251, in connect
    self.line_cache = LineCache(self.log_file_path)
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/var/www/embark/embark/logviewer.py", line 116, in __init__
    self.filehandle = open(filepath, "rb")
                      ^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: '/var/www/emba_logs/emba_update.log'

To Reproduce
Steps to reproduce the behavior:

1. EMBArk installation (default mode)
2. Start EMBArk: sudo ./run-server.sh
3. Open the updater page in a browser
4. See error

Expected behavior
When no update logs are present (yet), no error should be thrown.
A perfectly normal use-case that comes to mind is close to first start, when no such operations have yet been run.

Screenshots
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Desktop (please complete the following information):

• OS: Ubuntu 24.04 VM

Additional context
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