Add stroeerCore bidder documentation (#1) (prebid#2400)

* Add stroeerCore bidder documenation (#1)

* Add bid params table

* re-ordered sections

also demoted the ad unit config to level 3 instead of level 2

Co-authored-by: bretg <[email protected]>

Author: Kubitini

dev-docs/bidders/stroeerCore.md

@@ -0,0 +1,49 @@
+---
+layout: bidder
+title: StroeerCore
+description: Stroeer Bidder Adapter
+biddercode: stroeerCore
+media_types: banner
+gdpr_supported: false
+schain_supported: false
+coppa_supported: false
+usp_supported: false
+tcf2_supported: true
+safeframes_ok: true
+prebid_member: false
+pbjs: true
+pbs: false
+gvl_id: 136
+bidder_supports_deals: true
+---
+
+### Bid Params
+
+{: .table .table-bordered .table-striped }
+| Name          | Scope    | Description        | Example                      | Type     |
+|---------------|----------|--------------------|------------------------------|----------|
+| `sid`         | required | Slot ID            | `'06b782cc-091b-4f53-9cd2-0291679aa1ac'`| `string` |
+
+### Config Notes
+
+* Slot id (`sid`) is required. The adapter will ignore bid requests from prebid if `sid` is not provided. This must be in the decoded form. For example, "1234" as opposed to "MTM0ODA=". 
+* The server ignores dimensions that are not supported by the slot or by the platform (such as 987x123).
+
+### Ad unit configuration for publishers
+
+```javascript
+const adUnits = [{ 
+    code: 'div-gpt-ad-1460505748561-0',
+    mediaTypes: {
+        banner: {
+            sizes: [[300, 250]],
+        }
+    },
+    bids: [{
+        bidder: 'stroeerCore',
+        params: {
+          sid: "06b782cc-091b-4f53-9cd2-0291679aa1ac"
+        }    
+    }]
+}];
+```