nft minting

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

• install deps in package.json
• set api url and wallet private key into .env
• change both constructor args in contracts/MyNFT.sol to set the NFT collection name
• set network name (in two places) in config: hardhat.config.js
• compile npx hardhat compile
• deploy contract yarn run deploy
  • take the outputted contract address and store in MINTING_CONTRACT_ADDRESS
• making NFTS:
  • upload a file to IPFS
  • copy/rename nft-seed-data/nft-metadata-sample.json and fill in with your uploaded file's IPFS id, and other metadata.
  • upload that metadata file to IPFS, then store it's IPFS id as NFT_METADATA_IPFS_ID in env
  • run mint contract node scripts/mint-nft.js