ERC721基于OpenZeppelin的模板NFT代码

编写和部署一个NFT合约代码

https://ethereum.org/en/developers/tutorials/how-to-write-and-deploy-an-nft/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/utils/Counters.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import