docs: add cloud sandbox development documentation

develop-docs/development-infrastructure/devservices.mdx

@@ -230,3 +230,33 @@ docker run --rm \
 # Validate that data has been copied over
 docker run --rm -v sentry_postgres-data:/data ubuntu ls -l /data
 ```
+
+## Cloud Sandbox
+
+The `devservices sandbox` commands manage GCE virtual machines pre-configured with all Sentry dependencies, Docker services, and development tools.
+
+<Alert title="Employees Only" level="warning">
+  Cloud sandboxes require GCP project access. Contact #discuss-dev-infra for setup.
+</Alert>
+
+See the <Link to="/development/sandbox/">Cloud Sandbox documentation</Link> for full details.
+
+### Quick Reference
+
+```shell
+devservices sandbox create [NAME] --project PROJECT    # Create a new sandbox VM
+devservices sandbox ssh [NAME]                         # SSH with auto port-forward
+devservices sandbox ssh-config [NAME] --append         # Generate SSH config for IDE integration
+devservices sandbox sync [NAME]                        # Sync code changes
+devservices sandbox logs [SERVICE] [-f] [--color]      # View service logs (colored)
+devservices sandbox migrate [NAME]                     # Run database migrations
+devservices sandbox restart-devserver [NAME]            # Restart the devserver
+devservices sandbox exec "COMMAND"                     # Run a command on the sandbox
+devservices sandbox hybrid [NAME]                      # Local devserver + remote services
+devservices sandbox stop [NAME]                        # Stop VM (preserves disk)
+devservices sandbox start [NAME]                       # Restart stopped VM
+devservices sandbox destroy [NAME]                     # Delete VM and disk
+devservices sandbox list                               # List all sandboxes
+devservices sandbox status [NAME]                      # Show sandbox details
+devservices sandbox port-forward [NAME]                # Background port forwarding
+```

develop-docs/development-infrastructure/environment/index.mdx

@@ -7,6 +7,9 @@ sidebar_order: 2
 We primarily support development on macOS (arm64 only), but Linux (amd64) should be possible too.
 If you run into any problems on either platform, please open an issue on [devenv](https://github.com/getsentry/devenv/).
 
+<Alert title="Cloud Sandbox Alternative" level="info">
+  Don't want to run Docker and dependencies locally? Use a <Link to="/development/sandbox/">cloud sandbox</Link> — a pre-configured GCE VM with everything installed. Just `devservices sandbox create` and `devservices sandbox ssh`.
+</Alert>
 
 ## Setup