feat: add Render MCP server definition (#68)

* Add Render MCP server definition

Official Render MCP server for managing services, deployments, and databases.
Uses Docker with ghcr.io/render-oss/render-mcp-server image.

https://claude.ai/code/session_013AxurW8hPAfnUNvik354Xx

* fix: update server definition (input type 'password' -> 'text' for RENDER_API_KEY)

* fix: rename server files with transport suffix

- com.render-mcp.json -> com.render-mcp-docker.json (id: com.render-mcp-docker)

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

---------

Signed-off-by: Mohammod Al Amin Ashik <maa.ashik00@gmail.com>

Author: its-mash

servers/com.render-mcp-docker.json

@@ -0,0 +1,77 @@
+{
+  "$schema": "../schemas/server-definition.schema.json",
+  "id": "com.render-mcp-docker",
+  "name": "Render (Docker)",
+  "alias": "render",
+  "description": "Manage Render services, deployments, and databases. Create and update web services, view logs, manage environment groups, and trigger deploys.",
+  "icon": "https://avatars.githubusercontent.com/u/114033652?v=4",
+  "schema_version": "2.1",
+  "categories": [
+    "cloud",
+    "developer-tools"
+  ],
+  "tags": [
+    "render",
+    "deployment",
+    "hosting",
+    "infrastructure",
+    "paas",
+    "databases"
+  ],
+  "transport": {
+    "type": "stdio",
+    "command": "docker",
+    "args": [
+      "run",
+      "-i",
+      "--rm",
+      "-e",
+      "RENDER_API_KEY",
+      "ghcr.io/render-oss/render-mcp-server"
+    ],
+    "env": {
+      "RENDER_API_KEY": "${input:RENDER_API_KEY}"
+    },
+    "metadata": {
+      "inputs": [
+        {
+          "id": "RENDER_API_KEY",
+          "label": "Render API Key",
+          "description": "API key for the Render platform.",
+          "type": "text",
+          "required": true,
+          "secret": true,
+          "placeholder": "rnd_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
+          "obtain": {
+            "url": "https://dashboard.render.com/settings#api-key",
+            "instructions": "1. Go to dashboard.render.com > Account Settings\n2. Scroll to API Keys section\n3. Click 'Create API Key'\n4. Copy the key",
+            "button_label": "Create API Key"
+          }
+        }
+      ]
+    }
+  },
+  "auth": {
+    "type": "api_key",
+    "instructions": "Create an API key at https://dashboard.render.com/settings#api-key"
+  },
+  "contributor": {
+    "name": "Render",
+    "github": "render-oss",
+    "url": "https://render.com"
+  },
+  "links": {
+    "repository": "https://github.com/render-oss/render-mcp-server",
+    "homepage": "https://render.com",
+    "documentation": "https://render.com/docs/mcp-server"
+  },
+  "platforms": [
+    "all"
+  ],
+  "capabilities": {
+    "tools": true,
+    "resources": false,
+    "prompts": false,
+    "read_only_mode": false
+  }
+}