Fix email sent file

[vincentjanv]

This fixes #4 and #6 by only creating the JSON file after the email was sent. We also add the required URL parameters to download the invoice.

[aSauerwein]

hi!

thanks for the pull request.
does it really solve your issues ?

the params are given to base_req as *args and in base_req it`s passed to the request method.
appending all those params to the URL should not make any difference.

i've seen those "read errors" in the past as well, but for me it always looked like a rate limit. Once I implemented the wait between tries it got resolved.

I appreciate the changes to send_mails and dockerfile. I'll for sure accept those.

[vincentjanv]

hi!

thanks for the pull request. does it really solve your issues ?

the params are given to base_req as *args and in base_req it`s passed to the request method. appending all those params to the URL should not make any difference.

i've seen those "read errors" in the past as well, but for me it always looked like a rate limit. Once I implemented the wait between tries it got resolved.

I appreciate the changes to send_mails and dockerfile. I'll for sure accept those.

Hi! Yeah, not sure why the params didnt work when passing it with as arguments. Manually adding them did work, so I just left it...