App: exit safely if dependencies or config.js aren't set up on launch

app.js

@@ -49,7 +49,8 @@ const path = require('path');
 try {
 	require.resolve('sockjs');
 } catch (e) {
-	throw new Error("Dependencies unmet; run npm install");
+	console.error('Dependencies are unmet; run npm install before launching Pokemon Showdown again.');
+	process.exit(1);
 }
 
 /*********************************************************
@@ -62,14 +63,16 @@ try {
 	if (err.code !== 'MODULE_NOT_FOUND') throw err; // should never happen
 
 	// Copy it over synchronously from config-example.js since it's needed before we can start the server
-	console.log("config.js doesn't exist - creating one with default settings...");
+	console.error("config.js doesn't exist. Creating one with default settings...");
 	fs.writeFileSync(path.resolve(__dirname, 'config/config.js'),
 		fs.readFileSync(path.resolve(__dirname, 'config/config-example.js'))
 	);
-} finally {
-	global.Config = require('./config/config');
+	console.error('Pokemon Showdown will now exit. Modify whichever config settings you wish before relaunching the server.');
+	process.exit(1);
 }
 
+global.Config = require('./config/config');
+
 if (Config.watchconfig) {
 	let configPath = require.resolve('./config/config');
 	fs.watchFile(configPath, (curr, prev) => {