Silently exit webpack process if no entry points are found in src or modules

This better supports the community edition which currently has no code or
modules that match and throws an error.

services/web/webpack.config.js

@@ -15,6 +15,12 @@ if (fs.existsSync(MODULES_PATH)) {
 	}, entryPoints)
 }
 
+// If no entry points are found, silently exit
+if (!Object.keys(entryPoints).length) {
+	console.warn('No entry points found, exiting')
+	process.exit(0)
+}
+
 module.exports = {
 	// Defines the "entry point(s)" for the application - i.e. the file which
 	// bootstraps the application