Allow env var access to context

packages/node_modules/@node-red/runtime/lib/flows/Flow.js

@@ -719,6 +719,14 @@ class Flow {
         });
     }
 
+    getContext(scope) {
+        if (scope === 'flow') {
+            return this.context
+        } else if (scope === 'global') {
+            return context.get('global')
+        }
+    }
+
     dump() {
         console.log("==================")
         console.log(this.TYPE, this.id);