diff --git a/workshop/coba.conf b/workshop/coba.conf
new file mode 100644
index 0000000..c7b7122
--- /dev/null
+++ b/workshop/coba.conf
@@ -0,0 +1,14 @@
+upstream backend_server {
+    server localhost:9991 weight=2;
+    server localhost:9992 weight=1;
+    server localhost:9993 weight=2;
+    server localhost:9994 weight=2;
+}
+
+server {
+    listen 9999;
+
+    location / {
+        proxy_pass http://backend_server;
+    }
+}
\ No newline at end of file