Enhance Pulumi server.yaml with description and secrets (github#250)

Added description and configuration for secrets in Pulumi server.

Author: EronWright

servers/pulumi/server.yaml

@@ -8,9 +8,15 @@ meta:
     - devops
 about:
   title: Pulumi
+  description: Pulumi MCP server enables AI-powered coding assistants to help you codify cloud architectures and get diffs for infrastructure changes right in your development environment.
   icon: https://avatars.githubusercontent.com/u/21992475?s=200&v=4
 source:
   project: https://github.com/pulumi/mcp-server
 run:
   command:
     - stdio
+config:
+  secrets:
+    - name: pulumi.access_token
+      env: PULUMI_ACCESS_TOKEN
+      example: <PULUMI_ACCESS_TOKEN>