docs: update README with full project description

little bugfix for tests

add validation for unique training title per owner

add Google registration button on signup page

add deployment config (build.sh, render.yaml), update settings for PostgreSQL/Whitenoise

add support for PostgreSQL via DATABASE_URL

add docstrings and type annotations; fix import models in api/views; configure Sentry

add OpenAPI spec and Postman collection

fix: rename validate_schedule to validate_schedule_id for proper field validation

complete API for bookings and favorites, integrate frontend with dynamic buttons, add gym creation, owner permissions, user profile, swagger, filtering, pagination

add full CRUD for Booking

add read-only API for Schedule with filtering by training_id, add read-only API for Gym

add owner to Gym, filter gyms by owner in training form, fix gym_form template

admin: add owner column in Training list

allow consumers to create trainings auto-promote to realizator

fix: make gym writable via gym_id field in TrainingSerializer

add UserProfile with roles

feat: add DRF, api app, Training read-only API, Swagger

Add .gitignore

Add .gitignore