Fix a 404 error when loading the dashboard

[BelKed]

This PR fixes the following issues:

• Fixes 404 error when loading the dashboard #143
• Fixes 404 Error activitywatch#922

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I added the missing parameters to the AWFlask class initialisation in the _start() method.
I also added the venv folder to the .gitignore file.

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^{It definitely didn't take about 2 hours to figure out what's wrong :D}

[codecov]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (7527c8d) 55.64% compared to head (9cabc8e) 55.64%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #144   +/-   ##
=======================================
  Coverage   55.64%   55.64%           
=======================================
  Files          11       11           
  Lines         629      629           
=======================================
  Hits          350      350           
  Misses        279      279           

Files Changed	Coverage Δ
aw_server/server.py	77.27% <100.00%> (ø)

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[wakamex]

this works for me.

[ErikBjare]

Very nice, thank you so much for finding this! ❤️