Gh#2536 flask mail

[MarcelGeo]

Resolves https://github.com/MerginMaps/server-private/issues/2536 and Fixes https://github.com/MerginMaps/server-private/issues/2653

Fix ⚒️

• add MAIL_USERNAME and MAIL_PASSWORD default as None for better handling of empty authentication of non secure SMTP servers
• update for variables as MAIL_BCC to add there default value (server was failing without MAIL_BCC)
• remove unnecessary values from .prod.env
• reorder variables in .prod.env to follow docs and importance

Added ➕

• introduce flask server check command with checks for current deployment

$ docker exec -it merginmaps-server flask server check --email marcel.kocisek@gmail.com
You are running server version 2024.5.3
No base URL set. Please set MERGIN_BASE_URL environment variable
Database initialized properly
Celery running properly
$ docker exec -it merginmaps-server flask server send-check-email --email marcel.kocisek@gmail.com
Sending email to specified email address marcel.kocisek@gmail.com. Check your inbox.

• introduce maildev server to docker-compose.dev.yml for testing of emails
• reintroduce CONTACT_EMAIL as non required variable, which is sending to statistics

❓

• not sure if we want to enable GEVENT_WORKER by efault for deployments @varmar05 ... there is also issue on local machine, that with GEVENT_WORKER=1 and some CELERYD variables is celery not starting properly ❗

[coveralls]

Pull Request Test Coverage Report for Build 12238418323

Details

• 22 of 50 (44.0%) changed or added relevant lines in 6 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.4%) to 93.39%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
server/mergin/commands.py	13	41	31.71%

Totals
Change from base Build 12034250578:	-0.4%
Covered Lines:	6414
Relevant Lines:	6868

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💛 - Coveralls