feat: add environment variable documentation and update configurations for socket port in Docker setup

monolith-entrypoint.sh

@@ -15,6 +15,11 @@ if [ -z "$TELEGRAF_MONGODB_DATABASE" ]; then
     exit 1
 fi
 
+if [ -z "$SOCKET_PORT" ]; then
+    echo "Error: SOCKET_PORT is not set"
+    exit 1
+fi
+
 if [ -z "$VIDEO_URL" ]; then
     echo "Error: VIDEO_URL is not set"
     exit 1