🔴 Bug: `Error: redisUrl is required`

• split to secondary bug at https://github.com/vercel-labs/mcp-for-next.js/issues/18

Steps to Reproduce

1. run:

   #/usr/bin/env bash
   nvm install
   nvm use
   pnpm install -D
   
   # https://github.com/redis/node-redis/blob/9ea260f/packages/client/lib/client/index.ts#L33
   # replace `redis[s]://[[username][:password]@][host][:port][/db-number]` with your actual `REDIS_URL`
   echo "REDIS_URL=\"redis[s]://[[username][:password]@][host][:port][/db-number]\"" > .env.local
   
   pnpm build
   pnpm dev

2. in another terminal, run:

   #/usr/bin/env bash
   nvm install
   nvm use
   npm i -g @modelcontextprotocol/sdk@latest
   node scripts/test-client.mjs http://localhost:3000

3. 🔴 see that the output reads:

   > next.js-mcp-server@0.1.0 dev /Users/patrick/src/servant-io/mcp-for-next.js
   > next dev
   
      ▲ Next.js 15.2.4
      - Local:        http://localhost:3000
      - Network:      http://192.168.1.52:3000
   
    ✓ Starting...
    ✓ Ready in 2.8s
    ○ Compiling /[transport] ...
    ✓ Compiled /[transport] in 1443ms (994 modules)
   Error: redisUrl is required
       at Generator.next (<anonymous>)
       at new Promise (<anonymous>)
       at Generator.next (<anonymous>)
       at new Promise (<anonymous>)
       at new Promise (<anonymous>)
    ⨯ unhandledRejection: Error: redisUrl is required
       at Generator.next (<anonymous>)
       at new Promise (<anonymous>)
       at Generator.next (<anonymous>)
       at new Promise (<anonymous>)
       at new Promise (<anonymous>)
    ⨯ unhandledRejection:  Error: redisUrl is required
       at Generator.next (<anonymous>)
       at new Promise (<anonymous>)
       at Generator.next (<anonymous>)
       at new Promise (<anonymous>)
       at new Promise (<anonymous>)