NFT.sol for solidity ^0.8.10

NFT.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
import "@openzeppelin/contracts/utils/Counters.sol";

contract NFT is ERC721, ERC721URIStorage {
    using Counters for Counters.Counter;
    Counters.Counter private _tokenIds;
    address private marketplaceAddress; 

    constructor(address _marketplaceAddress) ERC721("CollectibleNFT", "NFT") {
	marketplaceAddress = _marketplaceAddress;
    }

    function mint(string memory _tokenURI)
        public
        returns (uint256)
    {
        _tokenIds.increment();

        uint256 newItemId = _tokenIds.current();
        _mint(msg.sender, newItemId);
        _setTokenURI(newItemId, _tokenURI);
	setApprovalForAll(marketplaceAddress, true);

        return newItemId;
    }

    function _burn(uint256 tokenId)
        internal
        override(ERC721, ERC721URIStorage)
    {
        super._burn(tokenId);
    }

    function tokenURI(uint256 tokenId)
        public
        view
        override(ERC721, ERC721URIStorage)
        returns (string memory)
    {
        return super.tokenURI(tokenId);
    }

    function _baseURI() 
	internal 
	view
	override 
	returns (string memory) 
    {
        return "http://localhost:5000/static/";
    }
}