docs(readme): add name's background

Author: AkinoKaede

README.md

@@ -2,6 +2,8 @@
 
 A quick and secure reverse proxy based on QUIC for NAT traversal.
 
+> The name is inspired by an esper ability called *Asport (遠隔射出, lit. “Remote Emission”)* from *A Certain Magical Index (とある魔術の禁書目録)*. This ability enables an esper to instantly transport matter across space.
+
 ## Introduction
 
 Asport is a project that aims to provide an implementation for ASPORT. ASPORT is a reverse proxy protocol that uses QUIC
@@ -84,4 +86,4 @@ project.
 
 This repository is licensed under [GNU General Public License v3.0 or later](./LICENSE).
 
-SPDX-License-Identifier: [GPL-3.0-or-later](https://spdx.org/licenses/GPL-3.0-or-later.html)
+SPDX-License-Identifier: [GPL-3.0-or-later](https://spdx.org/licenses/GPL-3.0-or-later.html)