Added documentation for systemd-based Telegram Bot

[NecroKote]

Closes #42

[coveralls]

Pull Request Test Coverage Report for Build 1766290867

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 67.859%

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Totals
Change from base Build 1623124933:	0.0%
Covered Lines:	1119
Relevant Lines:	1649

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💛 - Coveralls

[idlesign]

Thank you. Merged.