docs: add docs for host resource

website/docs/r/resource_host.html.markdown

@@ -0,0 +1,40 @@
+---
+layout: "boundary"
+page_title: "Boundary: host_resource"
+sidebar_current: "docs-boundary-host-catalog-resource"
+description: |-
+  Host resource for the Boundary Terraform provider.
+---
+
+# host_resource 
+The host resource allows you to configure a Boundary static host. Hosts are always part 
+of a project, so a project resource should be used inline or you should have the project 
+ID in hand to successfully configure a host. 
+
+## Example Usage
+
+```hcl
+resource "boundary_organization" "foo" {}
+
+resource "boundary_project" "example" {
+  description = "My first project!"
+  scope_id    = boundary_organization.foo.id
+}
+
+resource "boundary_host" "example" {
+  name        = "My catalog"
+  description = "My first host!"
+  address     = "10.0.0.1:8080"
+  scope_id    = boundary_project.example.id
+}
+```
+
+## Argument Reference
+
+The following arguments are required:
+* `scope_id` - The scope ID in which the resource is created.
+
+The following arguments are optional:
+* `name` - The host name. Defaults to the resource name.
+* `description` - The host description.
+* `address` - The static address of the host resource as <IP>:<port> or a domain name.