added env

flaskr/hello.py

@@ -9,10 +9,15 @@
 
 
 from flask import Flask
+import os
 
 app = Flask(__name__)
 
 
 @app.route('/')
 def hello():
-    return 'Hello World!\n'
+    return 'Hello world!\n'
+
+@app.route('/env')
+def env():
+    return "\n".join([f"{k}: {v}" for k,v in os.environ.items()])