Initial scaffold

packages/shared/src/config/env.js

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+// A simple utility to load environment variables from a .env file
+// Each service calls this at startup to load its configuration
+
+function getEnv(key, defaultValue){
+    const value = process.env[key];
+
+    //check if the desired value exists, if not check if a default value was provided, if not throw an error
+    if (value === undefined) {
+        if (defaultValue === undefined) {
+            throw new Error(`Missing required environment variable: ${key}`);
+        }
+        return defaultValue;
+    }
+    return value;
+}
+
+module.exports = {getEnv};

packages/shared/src/index.js

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+const {getEnv} = require('./config/env');
+
+module.exports = {getEnv};