Add optional HorizontalPodAutoscaler to renderer chart

charts/vs-renderer/templates/hpa.yaml

+{{ if .Values.hpa.enabled }}
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: vs-renderer
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: vs-renderer
+  minReplicas: {{ .Values.hpa.minReplicas }}
+  maxReplicas: {{ .Values.hpa.maxReplicas }}
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 100
+{{ end }}

charts/vs-renderer/values.yaml

-replicaCount: 1
 nameOverride:
 fullNameOverride:
 
@@ -19,6 +18,12 @@ livenessProbe:
 
 imagePullSecrets: []
 
+replicaCount: 1
+hpa:
+  enabled: false
+  minReplicas: 1
+  maxReplicas: 3
+
 service:
   type: ClusterIP
   port: 80