PaperCatsConstructor.sol

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

import '@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol';
import '@openzeppelin/contracts/access/Ownable.sol';

contract PaperCats is ERC721Enumerable, Ownable {
   string _baseTokenURI;
    
    constructor(string memory baseURI) ERC721("Paper Cats", "PCATS") {
        setBaseURI(baseURI);
    }
    
    function _baseURI() internal view virtual override returns (string memory) {
        return _baseTokenURI;
    }

    function setBaseURI(string memory baseURI) public onlyOwner {
        _baseTokenURI = baseURI;
    }
}