This function allows the contract owner to set the base URI for token metadata.
newuri: The new base URI to be set.
```remix-solidity
/**
* @dev Sets the base URI for token metadata.
* @param newuri The new base URI to be set.
* @notice This function can only be called by the owner of the contract.
* @notice The base URI is used as the starting point for constructing token URI.
* @notice This function allows the contract owner to dynamically update the base URI for all token metadata.
*/
function setBaseURI(string memory newuri) public onlyOwner {
_setURI(newuri);
}
```