fs-extra.exists depreciated

[pcnate]

Replace fs.exists on L77

raspberry-pi-camera/server.js

Lines 75 to 81 in 7c7b3bf

	async function waitForFile( file ) {
	while( true ) {
	const exists = await fs.exists( file );
	if( exists ) return true;
	await sleep( 333 );
	}
	}

fs-extra.exists

/**
Asynchronously tests whether or not the given path exists by checking with the file system.

@deprecated — since v1.0.0 Use fs.stat() or fs.access() instead

@param path
A path to a file or directory. If a URL is provided, it must use the file: protocol. URL support is experimental.
**/