docs: add comprehensive server setup guide

Add docs/server-setup.md covering:
- Docker Compose quickstart
- Configuration (database, cache, queue, auth)
- Health checks and server capabilities
- Worker connection (PHP, Python, custom languages)
- CLI usage
- Deployment (Docker, Kubernetes)
- API reference (control plane, worker protocol, system)
- Troubleshooting

Cross-link from:
- docs/sdks/python.md: Link to server-setup instead of worker-protocol
- docs/cli.mdx: Reference server-setup in configure section
- docs/installation.md: Add alternative server option for polyglot/non-Laravel

Addresses Python SDK and polyglot user needs for standalone server guidance.

Fixes #261

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: durable-workflow-ops

docs/cli.mdx

@@ -30,7 +30,7 @@ dw --version
 
 ## Configure
 
-Point the CLI at your server:
+Point the CLI at your server. See [Server Setup](/docs/2.0/server-setup) to deploy a server.
 
 ```bash
 export DURABLE_WORKFLOW_SERVER_URL=http://localhost:8080

docs/installation.md

@@ -4,6 +4,10 @@ sidebar_position: 2
 
 # Installation
 
+This guide covers installing the Durable Workflow PHP package for Laravel applications.
+
+**Alternative**: For polyglot environments, Python workers, or non-Laravel deployments, see [Server Setup](/docs/2.0/server-setup) to run the standalone server.
+
 ## Requirements
 
 Durable Workflow requires the following to run:

docs/sdks/python.md

@@ -11,7 +11,7 @@ The SDK targets the same durable model as the PHP package — instance IDs, run
 ## Requirements
 
 - Python 3.10 or later
-- A running [Durable Workflow server](/docs/2.0/configuration/worker-protocol)
+- A running [Durable Workflow server](/docs/2.0/server-setup)
 
 ## Installation