Refactored code.

Cargo.toml

src/config.rs

src/errors.rs

src/main.rs

src/protocol/core/mod.rs

src/protocol/core/routes.rs

src/protocol/creation/mod.rs

src/protocol/creation/routes.rs

src/protocol/creation_with_upload/mod.rs

src/protocol/creation_with_upload/routes.rs

src/protocol/mod.rs

src/protocol/termination/mod.rs

src/protocol/termination/routes.rs

src/routes.rs

src/storages/file_storage.rs

src/storages/mod.rs