Add README.md with installation instructions

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

README.md

@@ -1 +1,30 @@
 # Microservices demo
+
+This project contains a 10-tier microservices application. The application is a
+web-based e-commerce app called “Hipster Shop” where users can browse items,
+add them to the cart, and purchase them.
+
+### Setup on GKE
+
+0. Make sure you have a Google Kubernetes Engine cluster and enabled Google
+   Container Registry (GCR) on your GCP project:
+
+       gcloud services enable containerregistry.googleapis.com
+
+1. Edit `skaffold.yaml`, prepend your GCR registry host (`gcr.io/YOUR_PROJECT/`)
+   to all `imageName:` fields.
+
+2. Edit the Deployment manifests at `kubernetes-manifests` directory and update
+   the image names to match the changes you made in the previous step.
+
+3. Install [Skaffold] and `skaffold run`. This builds the container
+   images, pushes them to GFR, and deploys the application to Kubernetes.
+
+4.  Find the IP address of your application:
+
+        kubectl get service frontend-external
+
+    then visit the application on your browser to confirm
+    installation.
+
+[Skaffold]: https://github.com/GoogleContainerTools/skaffold/#installation

kubernetes-manifests/frontend.yaml

@@ -71,5 +71,5 @@ spec:
   selector:
     app: frontend
   ports:
-  - port: 8081
+  - port: 80
     targetPort: 8080