added config files for the systemd.timer environment and documentation for use

systemd_timer_files/README.md

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+# Installation of timer files
+
+# Setting the correct path
+In `pythontaskcheck.timer` replace `[[path_to_repo]]` with the absolute path to the repo root.
+
+# Setting up systemd.timer
+Move `pythontaskcheck.timer` and `pytontaskcheck.service` to the `$XDG_RUNTIME_DIR/systemd/user/` dir.
+Run the following commands to enable the scheduled execution.
+```
+$ systemctl --user deamon-reload
+$ systemctl --user enable pythontaskcheck.timer
+$ systemctl --user start pythontaskcheck.timer
+```
+
+# Check if everything is working
+```
+$ systemctl --user start pythontaskcheck.service
+```
+executes the script via systemd.
+```
+$ systemctl list-timers --user 
+```
+shows the list with timers. Yours should be listed here.
+
+# updating the time. 
+Current setup will trigger the script every 5 minutes from 9:00 till 17:55
+

systemd_timer_files/pythontaskcheck.service

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+[Unit]
+Description="Start python scripts that checks Todoist Status and reminds user"
+
+[Service]
+WorkingDirectory=[[path_to_repo]]
+ExecStart=[[path_to_repo]]/venv/bin/python3 [[path_to_repo]]/taskcheck.py
+
+[Install]
+WantedBy=graphical.target

systemd_timer_files/pythontaskcheck.timer

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+[Unit]
+Description="Run Python script multiple times per day."
+
+[Timer]
+OnCalendar=Mon..Fri *-*-* 09..17:00/5:00
+Unit=pythontaskcheck.service
+
+[Install]
+WantedBy=graphical.target