Add week 8 materials

materials/08-scaling/seminar/nginx-balancing/nginx.conf

@@ -0,0 +1,13 @@
+upstream rr_backend {
+    server server2:8000;
+    server server1:8000;
+}
+
+server {
+    listen 8000;
+    server_name _;
+
+    location / {
+        proxy_pass http://rr_backend;
+    }
+}