Kubernetes: Error converting YAML to JSON: yaml: line 12: did not find expected key - kubernetes

Question

I'm trying to add ciao to my Kubernetes single node cluster and every time I run the kubectl apply -f command, I keep running into the error " error converting YAML to JSON: YAML: line 12: did not find expected key ". I looked at the other solutions but they were no help. Any help will be appreciated.
kind: Namespace
metadata:
name: monitoring
---
apiVersion: v1
kind: Secret
metadata:
name: ciao
namespace: monitoring
data:
BASIC_AUTH_USERNAME: YWRtaW4=
BASIC_AUTH_PASSWORD: cGFzc3dvcmQ=
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: ciao
namespace: monitoring
spec:
replicas: 1
template:
metadata:
selector:
labels:
app: ciao
spec:
containers:
- image: brotandgames/ciao:latest
imagePullPolicy: IfNotPresent
name: ciao
volumeMounts: # Emit if you do not have persistent volumes
- mountPath: /app/db/sqlite/
name: persistent-volume
subPath: ciao
ports:
- containerPort: 3000
resources:
requests:
memory: 256Mi
cpu: 200m
limits:
memory: 512Mi
cpu: 400m
envFrom:
- secretRef:
name: ciao
---
apiVersion: v1
kind: Service
metadata:
name: ciao
namespace: monitoring
spec:
ports:
- port: 80
targetPort: 3000
protocol: TCP
type: NodePort
selector:
app: ciao

Answer 1

Looks there's an indentation in your Deployment definition. This should work:
apiVersion: apps/v1
kind: Deployment
metadata:
name: ciao
namespace: monitoring
labels:
app: ciao
spec:
replicas: 1
selector:
matchLabels:
app: ciao
template:
metadata:
labels:
app: ciao
spec:
containers:
- image: brotandgames/ciao:latest
imagePullPolicy: IfNotPresent
name: ciao
volumeMounts: # Emit if you do not have persistent volumes
- mountPath: /app/db/sqlite/
name: persistent-volume
subPath: ciao
ports:
- containerPort: 3000
resources:
requests:
memory: 256Mi
cpu: 200m
limits:
memory: 512Mi
cpu: 400m
envFrom:
- secretRef:
name: ciao
Keep in mind that in this definition the PV persistent-volume needs to exist in your cluster/namespace.