Can't connect to node app on kubernetes - jenkins

Question

I've just finished Google's tutorial on how to implement continuous integration for a Go app on Kubernetes using Jenkins, and it works great. I'm now trying to do the same thing with a Node app that is served on port 3001, but I keep getting this error:
{
"kind": "Status",
"apiVersion": "v1",
"metadata": {},
"status": "Failure",
"message": "services \"gceme-frontend\" not found",
"reason": "NotFound",
"details": {
"name": "gceme-frontend",
"kind": "services"
},
"code": 404
}
The only thing I've changed on the routing side is having the load balancer point to 3001 instead of 80, since that's where the Node app is listening. I have a very strong feeling that the error is somewhere in the .yaml files.
My node server (relevant part):
const PORT = process.env.PORT || 3001;
frontend-dev.yaml: (this is applied to the dev environment)
kind: Deployment
apiVersion: extensions/v1beta1
metadata:
name: gceme-frontend-dev
spec:
replicas:
template:
metadata:
name: frontend
labels:
app: gceme
role: frontend
env: dev
spec:
containers:
- name: frontend
image: gcr.io/cloud-solutions-images/gceme:1.0.0
resources:
limits:
memory: "500Mi"
cpu: "100m"
imagePullPolicy: Always
ports:
- containerPort: 3001
protocol: TCP
services/frontend.yaml:
kind: Service
apiVersion: v1
metadata:
name: gceme-frontend
spec:
type: LoadBalancer
ports:
- name: http
#THIS PORT ACTUALLY GOES IN THE URL: i.e. gcme-frontend: ****
#when it says "no endpoints available for service, that doesn't mean this one is wrong, it means that target port is not working not exist"
port: 80
#matches port and -port in frontend-*.yaml
targetPort: 3001
protocol: TCP
selector:
app: gceme
role: frontend
Jenkinsfile (for dev branches, which is what I'm trying to get working)
sh("kubectl get ns ${env.BRANCH_NAME} || kubectl create ns ${env.BRANCH_NAME}")
// Don't use public load balancing for development branches
sh("sed -i.bak 's#LoadBalancer#ClusterIP#' ./k8s/services/frontend.yaml")
sh("sed -i.bak 's#gcr.io/cloud-solutions-images/gceme:1.0.0#${imageTag}#' ./k8s/dev/*.yaml")
sh("kubectl --namespace=${env.BRANCH_NAME} apply -f k8s/services/")
sh("kubectl --namespace=${env.BRANCH_NAME} apply -f k8s/dev/")
echo 'To access your environment run `kubectl proxy`'
echo "Then access your service via http://localhost:8001/api/v1/proxy/namespaces/${env.BRANCH_NAME}/services/${feSvcName}:80/"

Answer 1

Are you creating Service or Ingress resources to expose your application to the outside world?
See tutorials:
https://cloud.google.com/kubernetes-engine/docs/tutorials/hello-app
https://cloud.google.com/kubernetes-engine/docs/tutorials/http-balancer
which have working examples you can copy and modify.