feat: add first working version for structure endpoint

Dockerfile

db/init-db.sh

docker-compose.yml

package-lock.json

package.json

src/app.module.ts

src/configuration/configuration.module.ts

src/configuration/configuration.service.ts

src/structures/dto/create-structure.dto.ts

src/structures/schemas/day.schema.ts

src/structures/schemas/structure.schema.ts

src/structures/schemas/time.schema.ts

src/structures/schemas/week.schema.ts

src/structures/structures.controller.ts

src/structures/structures.module.ts

src/structures/structures.service.ts