docs: update README for in-cluster dev

README.md

@@ -2,18 +2,61 @@
 
 Standalone Docker runner service extracted from the agynio/platform monorepo.
 
-## Development
+## Prerequisites
+
+Access to an agynio Kubernetes cluster (kubeconfig configured) and:
+
+| Tool | Version | Purpose |
+| --- | --- | --- |
+| kubectl | Compatible with cluster | Manage Kubernetes resources. |
+| devspace | Latest | Run the in-cluster DevSpace workflow. |
+| Docker Engine | Latest | Runs the k3d cluster used by bootstrap. |
+| k3d | v5.x | Local Kubernetes cluster for bootstrap. |
+| Terraform | >= 1.5.0 | Provision the bootstrap infrastructure. |
+
+No local Node.js or pnpm required; the dev container in the cluster runs the toolchain.
+
+## Cluster Setup
 
 ```sh
-pnpm install
-pnpm proto:generate
-pnpm lint
-pnpm build
-pnpm test
+gh repo clone agynio/bootstrap_v2
+cd bootstrap_v2
+cp stacks/platform/terraform.tfvars.example stacks/platform/terraform.tfvars
+./apply.sh -y
+kubectl get deployment docker-runner -n platform
+```
+
+## Development (DevSpace)
+
+```sh
+cd /path/to/docker-runner
+devspace dev
 ```
 
-## Docker
+DevSpace syncs the repo into the cluster dev container, runs `pnpm install` and
+`pnpm proto:generate`, then starts `tsx watch src/service/main.ts` for hot reload.
+It also forwards gRPC on port `50051` to your local machine.
+
+## Running Tests
 
 ```sh
-docker build -t ghcr.io/agynio/docker-runner .
+devspace enter
+pnpm test
+DOCKER_RUNNER_SHARED_SECRET=change-me pnpm test:e2e
 ```
+
+`pnpm test` runs unit + integration tests; the integration suite requires
+Docker, provided by the DinD sidecar in the dev pod. The e2e suite requires the
+shared secret env var shown above.
+
+## Troubleshooting
+
+- **Sync timeout**: if the dev container logs `ERROR: sync timeout`, restart
+  `devspace dev` and confirm the repo sync completed before the process starts.
+- **ArgoCD reverting changes**: DevSpace disables auto-sync for the
+  `docker-runner` ArgoCD app. If it keeps reverting, manually disable
+  auto-sync or re-run `devspace dev` to apply the patch again.
+- **Docker socket missing**: if `/var/run/docker.sock` is missing in the pod,
+  ensure the cluster nodes expose the Docker socket and the deployment mounts it.
+- **Port forwarding**: if `50051` is unavailable, confirm `devspace dev` is
+  still running and restart it to re-establish the port forward.