Add Github topics to repo

[emanuelb]

Improve project discoverability by adding github topics, see: https://help.github.com/en/github/administering-a-repository/classifying-your-repository-with-topics

Related topics are: https://github.com/topics/israel https://github.com/topics/irondome https://github.com/topics/idf https://github.com/topics/emergency https://github.com/topics/tseva-adom https://github.com/topics/siren https://github.com/topics/oref https://github.com/topics/missile https://github.com/topics/missile-alert https://github.com/topics/red-alarm https://github.com/topics/red-alert https://github.com/topics/redalert

[eladnava]

Hi @emanuelb, Thanks for your suggestion. I've added some of your recommended topics to the GitHub project.