fix: change health liveness probe port to 'http' (#2574)

Signed-off-by: Walter Moar <Walter.Moar@gov.bc.ca>

Author: WalterMoar

charts/app/templates/backend/templates/deployment.yaml

@@ -92,7 +92,7 @@ spec:
             failureThreshold: 3
             httpGet:
               path: /api/health
-              port: 3000
+              port: http
               scheme: HTTP
             initialDelaySeconds: 15
             periodSeconds: 30