Improve and update container starting message

.devcontainer/library-script/provide-user.sh

@@ -61,8 +61,9 @@ fi
 
 if [ -n "\${PS1}" ]; then
     echo
-    echo "To build and install openresty with the ngx_http_voms_module run 'build-install-ngx-voms.sh'"
-    echo "'nginx-httpg_no_delegation.patch' is needed in the directory where the user runs the script"
+    echo "To build and install openresty with the ngx_http_voms_module run"
+    echo "    sh build-install-openresty-voms.sh"
+    echo "The file 'nginx-httpg_no_delegation.patch' is needed in the directory where the user runs the script"
     echo
 fi
 EOF