Add week 8 materials

materials/08-scaling/seminar/nginx-balancing/hello-world/main.py

@@ -0,0 +1,15 @@
+from flask import Flask
+import sys
+
+app = Flask(__name__)
+
+if len(sys.argv) < 3:
+    print('please call with arguments <port> <hostname>')
+    exit()
+
+@app.route('/')
+def index():
+    return f'Hello from {app.name}\n'
+
+app.name = sys.argv[2]
+app.run(host='0.0.0.0', port=int(sys.argv[1]))