update doc and example

Author: Pearl1594

website/docs/r/network_offering.html.markdown

@@ -16,8 +16,24 @@ A `cloudstack_network_offering` resource manages a network offering within Cloud
 resource "cloudstack_network_offering" "example" {
     name = "example-network-offering"
     display_text = "Example Network Offering"
-    guest_ip_type = "Shared"
+    guest_ip_type = "Isolated"
     traffic_type = "Guest"
+    network_rate = 100
+    network_mode = "NATTED"
+    conserve_mode = true
+    enable = true
+    for_vpc = false
+    specify_vlan = true
+    specify_ip_ranges = true
+    max_connections = 256
+    supported_services = ["Dhcp", "Dns", "Firewall", "Lb", "SourceNat"]
+    service_provider_list = {
+        Dhcp = "VirtualRouter"
+        Dns = "VirtualRouter"
+        Firewall = "VirtualRouter"
+        Lb = "VirtualRouter"
+        SourceNat = "VirtualRouter"
+    }
 }
 ```
 
@@ -30,6 +46,20 @@ The following arguments are supported:
 * `display_text` - (Required) The display text of the network offering.
 * `guest_ip_type` - (Required) The type of IP address allocation for the network offering. Possible values are "Shared" or "Isolated".
 * `traffic_type` - (Required) The type of traffic for the network offering. Possible values are "Guest" or "Management".
+* `network_rate` - (Optional) The network rate in Mbps for the network offering.
+* `network_mode` - (Optional) The network mode. Possible values are "DHCP" or "NATTED".
+* `conserve_mode` - (Optional) Whether to enable conserve mode. Defaults to `false`.
+* `enable` - (Optional) Whether to enable the network offering. Defaults to `false`.
+* `for_vpc` - (Optional) Whether this network offering is for VPC. Defaults to `false`.
+* `for_nsx` - (Optional) Whether this network offering is for NSX. Defaults to `false`.
+* `specify_vlan` - (Optional) Whether to allow specifying VLAN ID. Defaults to `false`.
+* `specify_ip_ranges` - (Optional) Whether to allow specifying IP ranges. Defaults to `false`.
+* `specify_as_number` - (Optional) Whether to allow specifying AS number. Defaults to `false`.
+* `internet_protocol` - (Optional) The internet protocol. Possible values are "IPv4" or "IPv6". Defaults to "IPv4".
+* `routing_mode` - (Optional) The routing mode. Possible values are "Static" or "Dynamic".
+* `max_connections` - (Optional) The maximum number of concurrent connections supported by the network offering.
+* `supported_services` - (Optional) A list of supported services for this network offering.
+* `service_provider_list` - (Optional) A map of service providers for the supported services.
 
 ## Attributes Reference