This is a simple website that allows you to mint certificates on the IPFS network. You can upload a file, and the website will generate a unique id for it. This id is then stored on the database. Remember the certificates are not stored on the database, only the id is stored. The certificate is stored on the IPFS network. Anyone with the id can retrieve the certificate from the IPFS network. The certificate is immutable and cannot be altered. If someone tries to alter the certificate, the id will not change and we can verify that the certificate is altered.
We are using the NFT.storage service to store the certificates on the IPFS network. You can read more about the service here.