modified helm chart/templates to default to chart app version, instead of pulling latest container image. Changed uvicorn run command to included host 0.0.0.0 so that it can send/recieve traffic on the k8s cluster

Author: Rose Yemelyanova

helm/diffcalc-api/values.yaml

@@ -8,7 +8,7 @@ image:
   repository: ghcr.io/diamondlightsource/diffcalc-api
   pullPolicy: IfNotPresent
   # Overrides the image tag whose default is the chart appVersion.
-  tag: latest
+  tag: ""
 
 imagePullSecrets: []
 nameOverride: ""