AdHash Bidder Adapter: initial prebid.js integration (#2687)

dev-docs/bidders/adhash.md

@@ -0,0 +1,29 @@
+---
+layout: bidder
+title: AdHash
+description: Prebid AdHash Bidder Adapter
+pbjs: true
+biddercode: adhash
+safeframes_ok: false
+---
+
+### Note
+
+Here is what you need for Prebid integration with AdHash:
+1. Register with AdHash.
+2. Once registered and approved, you will receive a Publisher ID and Platform URL.
+3. Use the Publisher ID and Platform URL as parameters in params.
+
+Please note that a number of AdHash functionalities are not supported in the Prebid.js integration:
+* Cookie-less frequency and recency capping;
+* Audience segments;
+* Price floors and passback tags, as they are not needed in the Preebid.js setup;
+* Reservation for direct deals only, as bids are evaluated based on their price.
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name          | Scope    | Description  | Example                                        | Type     |
+|---------------|----------|--------------|------------------------------------------------|----------|
+| `publisherId` | required | Publisher ID | `'0x1234567890123456789012345678901234567890'` | `string` |
+| `platformURL` | required | Platform URL | `'https://adhash.org/p/struma/'`               | `string` |