Add valuad bid adapter

dev-docs/bidders/valuad.md

@@ -0,0 +1,34 @@
+---
+layout: bidder
+title: Valuad
+description: Prebid Valuad Bidder Adapter
+biddercode: valuad
+pbjs: true
+pbs: false
+prebid_member: false
+userId: none
+gpp_sids: usstate_all
+tcfeu_supported: false
+usp_supported: true
+coppa_supported: true
+schain_supported: true
+deals_supported: true
+floors_supported: true
+dchain_supported: false
+ortb_blocking_supported: false
+media_types: banner
+safeframes_ok: true
+ortb_blocking_supported: false
+sidebarType: 1
+---
+
+### Note
+
+The Valuad Header Bidding adapter requires setup and approval from Valuad. 
+Please reach out to your account manager or <hello@valuad.io> for more information
+
+### Bid Params
+
+| Name          | Scope    | Description                    | Example    | Type      |
+|---------------|----------|--------------------------------|------------|-----------|
+| `placementId` | required | Placement ID provided by VAluad | `'10000'`  | `string`  |