add apt update and fix docker name.

opensearch-1.x-node-installer.sh

@@ -81,6 +81,9 @@ if ! [ "$(id -u)" = 0 ]; then
    exit 0
 fi
 
+# Check update
+apt-get update -q2
+
 # Test RAM size (4GB min) + CPUs (min 2)
 #Check system resources
 printf "\n\nVerifying System Resources:"
@@ -160,7 +163,7 @@ else
 fi
 sleep .1
 # Check & install docker
-install_if_not docker
+install_if_not docker.io
 install_if_not docker-compose
 
 sysctl -w vm.max_map_count="$max_map_count"