Created the env check util

util/envCheck.ts

@@ -0,0 +1,14 @@
+/** The predefined environment values */
+const envValue: string[] = [
+    "MONGOOSE_STRING"
+]
+
+/** Checks if the provided value is registered in process.env */
+const isRegistered = (value: string) => process.env[value];
+
+/** Validates the .env file */
+module.exports.validate = () => {
+    for (let value of envValue) {
+        if (!isRegistered(value)) throw new Error(`Please register the environment value '${value}' in your .env file`);
+    }
+}