Added Server Object JSON examples.

Enhanced Server Object YAML examples with JSON examples to be consistent with remainder of document.

Author: ckriley

versions/3.0.md

@@ -338,13 +338,39 @@ This object can be extended with [Specification Extensions](#specificationExtens
 
 A single server would be described as:
 
+```json
+{
+  "url": "https://development.gigantic-server.com/v1",
+  "description": "Development server"
+}
+```
+
 ```yaml
 url: https://development.gigantic-server.com/v1
 description: Development server
 ```
 
 The following shows how multiple servers can be described, for example, at the OpenAPI Object's [`servers`](#oasServers):
 
+```json
+{
+  "servers": [
+    {
+      "url": "https://development.gigantic-server.com/v1",
+      "description": "Development server"
+    },
+    {
+      "url": "https://staging.gigantic-server.com/v1",
+      "description": "Staging server"
+    },
+    {
+      "url": "https://api.gigantic-server.com/v1",
+      "description": "Production server"
+    }
+  ]
+}
+```
+
 ```yaml
 servers:
 - url: https://development.gigantic-server.com/v1
@@ -357,6 +383,33 @@ servers:
 
 The following shows how variables can be used for a server configuration:
 
+```json
+{
+  "servers": [
+    {
+      "url": "https://{username}.gigantic-server.com:{port}/{basePath}",
+      "description": "The production API server",
+      "variables": {
+        "username": {
+          "default": "demo",
+          "description": "this value is assigned by the service provider, in this example `gigantic-server.com`"
+        },
+        "port": {
+          "enum": [
+            8443,
+            443
+          ],
+          "default": 8443
+        },
+        "basePath": {
+          "default": "v2"
+        }
+      }
+    }
+  ]
+}
+```
+
 ```yaml
 servers:
 - url: https://{username}.gigantic-server.com:{port}/{basePath}