Merge branch 'staging' into 'main'

.env

.gitignore

.scannerwork/.sonar_lock

.scannerwork/report-task.txt

Dockerfile

Dockerfile.dev

Dockerfile.test

docker-compose.yml

docs/docs.go

docs/swagger.json

docs/swagger.yaml

handler/course/updateCourse.go

handler/di.go

handler/lesson/addLesson.go

handler/lesson/addLessonMaterial.go

handler/lesson/deleteLesson.go

handler/lesson/deleteLessonMaterial.go

handler/lesson/getLesson.go

handler/lesson/getLessonMaterial.go

handler/lesson/getLessonMaterialsByLesson.go