Common scheduler

[atrovato]

Pull Request check-list

To ensure your Pull Request can be accepted as fast as possible, make sure to review and check all of these items:

• [ ] If your changes affects code, did your write the tests?
• [ ] Are tests passing? (npm test on both front/server)
• [ ] Is the linter passing? (npm run eslint on both front/server)
• [ ] Did you run prettier? (npm run prettier on both front/server)
• [ ] If you are adding a new features/services, did you run integration comparator? (npm run compare-translations on front)
• [ ] Did you test this pull request in real life? With real devices? If this development is a big feature or a new service, we recommend that you provide a Docker image to the community for testing before merging.
• [ ] If your changes modify the API (REST or Node.js), did you modify the API documentation? (Documentation is based on comments in code)
• [ ] If you are adding a new features/services which needs explanation, did you modify the user documentation? See the GitHub repo and the website.
• [ ] Did you add fake requests data for the demo mode (front/src/config/demo.js) so that the demo website is working without a backend? (if needed) See https://demo.gladysassistant.com.

NOTE: these things are not required to open a PR and can be done afterwards / while the PR is open.

Description of change

Please provide a description of the change here. It's always best with screenshots, so don't hesitate to add some!

[codecov[bot]]

Codecov Report

Merging #65 (3d2ffc8) into master (102d327) will decrease coverage by 0.02%. The diff coverage is n/a.

:exclamation: Current head 3d2ffc8 differs from pull request most recent head b974303. Consider uploading reports for the commit b974303 to get more accurate results

@@            Coverage Diff             @@
##           master      #65      +/-   ##
==========================================
- Coverage   97.28%   97.27%   -0.02%     
==========================================
  Files         645      643       -2     
  Lines        9724     9686      -38     
==========================================
- Hits         9460     9422      -38     
  Misses        264      264              

Impacted Files	Coverage Δ
server/api/controllers/gateway.controller.js	60.00% <0.00%> (-2.97%)	:arrow_down:
server/services/mqtt/lib/installContainer.js	97.05% <0.00%> (-0.17%)	:arrow_down:
server/api/routes.js	98.03% <0.00%> (ø)
server/models/dashboard.js	100.00% <0.00%> (ø)
server/utils/httpErrors.js	100.00% <0.00%> (ø)
server/lib/gateway/index.js	100.00% <0.00%> (ø)
server/lib/dashboard/index.js	100.00% <0.00%> (ø)
server/lib/dashboard/dashboard.get.js	100.00% <0.00%> (ø)
server/lib/dashboard/dashboard.create.js	100.00% <0.00%> (ø)
server/services/mqtt/lib/updateContainer.js	100.00% <0.00%> (ø)
... and 4 more

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