Add package registry stack instructions

stack_orchestrator/data/stacks/package-registry/README.md

@@ -2,4 +2,28 @@
 
 The Package Registry Stack supports a build environment that requires a package registry (initially for NPM packages only).
 
-Setup instructions can be found [here](../build-support/README.md).
+## Setup
+
+* Setup required repos and build containers:
+
+  ```bash
+  laconic-so --stack package-registry setup-repositories
+  laconic-so --stack package-registry build-containers
+  ```
+
+* Create a deployment:
+
+  ```bash
+  laconic-so --stack package-registry deploy init --output package-registry-spec.yml
+  # Update port mapping in the laconic-loaded.spec file to resolve port conflicts on host if any
+
+  laconic-so --stack package-registry deploy create --deployment-dir package-registry-deployment --spec-file package-registry-spec.yml
+  ```
+
+* Start the deployment:
+
+  ```bash
+  laconic-so deployment --dir package-registry-deployment start
+  ```
+
+* The local gitea registry can now be accessed at <http://localhost:3000> (the username and password can be taken from the deployment logs)