Maximum price calculations

Release provides new functionality for several items:

• Maximum price for Hitas apartments for all Hitas rules and indexes can be calculated.
• PDF letters of the calculation results to housing companies and property managers can be created.
• Housing companies, their properties and buildings can be viewed, added, edited, deleted
• Apartments can be viewed, added, edited, deleted
• Enables searching for housing companies and apartments
• Owner information can be added, edited
• Indexes can be added

What's Changed

• Backend project structure by @ranta in #2
• Front start by @matudelic in #3
• Initial datamodel by @toikarin-vincit in #4
• Major docker changes & Makefile added by @toikarin-vincit in #5
• housing company listing / reading endpoints by @toikarin-vincit in #6
• Front aihio by @vincit-matu in #8
• Azure devops pipeline files by @jannetasa in #7
• Custom error handling by @toikarin-vincit in #10
• Add Dockerfile for frontend and move docker-compose.yml to root by @toikarin-vincit in #11
• Master from coh hitas for pipeline changes by @jannetasa in #17
• source changed to dev pipelines by @jannetasa in #21
• Add env HITAS_TESTS_NO_DOCKER for disabling docker use in tests by @toikarin-vincit in #12
• docker changes for running in Platta by @toikarin-vincit in #20
• frontend/Dockerfile: Change to unprivileged nginx by @toikarin-vincit in #22
• update dependencies by @toikarin-vincit in #18
• Yhtiöt front dummy by @vincit-matu in #15
• HousingCompany Create serializer by @ranta in #13
• ViewSets by @ranta in #24
• Fix docker container not starting by @ranta in #25
• REST API filters by @ranta in #26
• Code viewsets by @ranta in #27
• Initial Apartments and Owner models and API endpoints by @ranta in #28
• frontend: update dependencies by @toikarin-vincit in #23
• Adds apartment views, some styling and relevant routing by @ranta in #29
• Add .idea to gitignore by @miqu in #30
• Frontend-API Integration by @ranta in #31
• Minor improvements by @toikarin-vincit in #32
• backend: add support for resetting migrations with RESET_MIGRATIONS=1 by @toikarin-vincit in #33
• added initial version of the migration tool by @toikarin-vincit in #34
• frontend: update yarn dependencies by @toikarin-vincit in #36
• fix random test failure and always generate random test data by @toikarin-vincit in #35
• Various fixes by @toikarin-vincit in #39
• liveness check fixes - uwsgi and healtcheck improvements by @toikarin-vincit in #38
• frontend: move react-scripts as dev dependency by @toikarin-vincit in #37
• Migrate housing companies by @toikarin-vincit in #40
• Housing company create page by @ranta in #41
• Initial style fixes by @vincit-matu in #42
• various fixes around APIs by @toikarin-vincit in #43
• backend: fix filtering apartments by housing company id by @toikarin-vincit in #45
• Apartment detail styles by @vincit-matu in #44
• S3 demo fixes front by @vincit-matu in #47
• Migrate apartments by @toikarin-vincit in #46
• backend: remove postal code from real estate, building and apartment by @toikarin-vincit in #48
• backend: rename "owners" to "ownership" and remove person.address by @toikarin-vincit in #49
• various minor improvements + dependency updates by @toikarin-vincit in #51
• Add missing fields to apartments by @toikarin-vincit in #53
• Apartment API update by @toikarin-vincit in #54
• Select postcode by @vincit-matu in #52
• housing company: add summary data by @toikarin-vincit in #55
• Adds summary information to housing company details (page/ui & model) by @vincit-matu in #58
• Basic auth and auth token by @toikarin-vincit in #56
• implement soft-delete for housing companies and related tables by @toikarin-vincit in #57
• API error msg improvements by @toikarin-vincit in #59
• API error message improvements (continued) and fix for code order by @toikarin-vincit in #60
• backend: make housing company's names unique by @toikarin-vincit in #61
• backend: hotfix for migration 0017 by @toikarin-vincit in #62
• backend: hotfix for migration 0017 by @toikarin-vincit in #63
• frontend: docker: add /healthz endpoint without authentication by @toikarin-vincit in #64
• backend: validate query params by @toikarin-vincit in #65
• API searches documented by @toikarin-vincit in #67
• Delete person with ownerships by @toikarin-vincit in #66
• Improvements by @toikarin-vincit in #68
• backend: fix updating housing companies without changing the names by @toikarin-vincit in #69
• Create apartment front by @vincit-matu in #71
• Housing Company edit page by @ranta in #72
• Writable improvements by @toikarin-vincit in #73
• front: Fixes ts-errors with housingCompanyCreate by @vincit-matu in #76
• S5 minifixes by @vincit-matu in #78
• Housing Company Legacy ID filtering by @ranta in #70
• Frontend API cache invalidation by @ranta in #77
• Add support for indices by @toikarin-vincit in #75
• backend: rename 'person' to 'owner' by @toikarin-vincit in #80
• Migration conflict by @toikarin-vincit in #82
• Filter fixes by @ranta in #79
• Implement listing/reading/updating indices by @toikarin-vincit in #81
• OpenAPI request validation by @toikarin-vincit in #84
• S5 testing fixes by @vincit-matu in #85
• Apartment edit page by @ranta in #86
• Make HousingCompany fields non-required by @ranta in #83
• backend: test__api__housing_company__filter: fix flaky tests by @toikarin-vincit in #91
• backend: Implement surface area price ceiling by @toikarin-vincit in #87
• remove realized acquisition price from housing company model by @toikarin-vincit in #88
• Apartment save fix by @ranta in #89
• backend: apartment: implement unconfirmed max_prices by @toikarin-vincit in #92
• Apartment rooms by @ranta in #90
• hitasmigration: anonymization improvements by @toikarin-vincit in #95
• Apartment required fields by @ranta in #93
• backend: Fix HousingCompany empty string to be a valid business id value by @ran...