feat(docker): guide clone installation and validate paired update artifacts

scripts/docker-start.mjs

@@ -27,7 +27,10 @@ export function validateRuntime(settings) {
 		throw new Error(`Invalid runtime configuration: ${invalid.join(", ")}`);
 }
 
-if (import.meta.url === pathToFileURL(process.argv[1]).href) {
+if (
+	process.argv[1] &&
+	import.meta.url === pathToFileURL(process.argv[1]).href
+) {
 	try {
 		validateRuntime(process.env);
 		const child = spawn(process.execPath, ["server.js"], { stdio: "inherit" });