Add placeholder server sleeping IP environment

variable

app/utils.py

@@ -0,0 +1,13 @@
+import os
+
+
+def docker_container_mapping():
+    port_ip_map_str = os.environ.get('PORT_IP_MAP')
+    # Convert the environment variable to a Python dictionary
+    port_ip_map = {}
+    for line in port_ip_map_str.split('\n'):
+        if line:  # ignore empty lines
+            port, ip = line.split(':')
+            port_ip_map[port.strip()] = ip.strip()
+
+    return port_ip_map