Added `useSia` config option for using Sia Skynet decentralized storage

src/setup.js

@@ -15,6 +15,7 @@ const config = {
 	dataEngine: '@tycrek/papito',
 	frontendName: 'ass-x',
 	indexFile: '',
+	useSia: false,
 	s3enabled: false,
 };
 
@@ -178,6 +179,12 @@ function doSetup() {
 				default: config.indexFile,
 				required: false
 			},
+			useSia: {
+				description: 'Use Sia Skynet for decentralized file storage?',
+				type: 'boolean',
+				default: config.useSia,
+				required: false
+			},
 			s3enabled: {
 				description: 'Enable uploading to S3 storage endpoints',
 				type: 'boolean',