Replace NodeJS dict aliases with maps and named field reads

Co-authored-by: Danny Kim <temeddix@gmail.com>
Co-committed-by: Danny Kim <temeddix@gmail.com>

src/prepare/index.ts

@@ -5,7 +5,9 @@ import { prepareRuntime } from "#runtime";
 
 const env = (name: string): string => {
   const value = process.env[name];
-  if (value === undefined || value === "") throw new Error(`${name} is not set`);
+  if (value === undefined || value === "") {
+    throw new Error(`${name} is not set`);
+  }
   return value;
 };