Add scheduled method to email

Added scheduled method to EmailMicroservice and endpoints to UserController for customers and houses(not working yet). Fixed some issues from the M2 review and updated the class diagram.

added backend feature labels

requested review from @xskacel, @xbugos, and @xfazlag

assigned to @xrouca and @xskacel

@xrouca fix conflict

added 8 commits

• 8094193e - Added Prometheus & Grafana usage directions.
• cce5589f - added prometheus for the microservices in docker
• 96046c16 - changed docker of electricity microservice to use postgres properly
• f0756236 - added one unique prometheus which tracks all microservices and added grafana...
• 849dcdbc - some changes to the db
• 9debe7b7 - deleted unneeded prometheus.yml files in microservices
• 22304714 - added inmemory db for tests in electricy
• 30b5888f - added locust description

Compare with previous version

added 16 commits

• 30b5888f...99b8d380 - 10 commits from branch milestone-3
• 0a78895f - Resolved conflict
• 11e47e4e - Added findAllCustomers and findHousesById
• b7c243d0 - Fixed M2 review and updated Class diagram
• baa08e47 - added prometheus for the microservices in docker
• 5a26bf8a - added prometheus for the microservices in docker
• c6440618 - Added Scheduled method to EmailService, some fixes for EmailMicroservice

Compare with previous version

added 1 commit

• 78e62b1a - Deleted h2 dependency from pom

Compare with previous version

approved this merge request

added 1 commit

• 78fb7d37 - Added RepositoryTest to ElectricityPrice

Compare with previous version

approved this merge request

Kdyz to jeste neni mergnute, tak odstran ty star imports

requested review from @xrouca

approved this merge request

mentioned in commit 99f9b4bd

merged