set KRATOS_PUBLIC_URL to internal network URL for initialize user job

deployment/helmchart/templates/job-initialize-user.yaml

@@ -41,6 +41,8 @@ spec:
             value: {{ .Values.backend.initialUser.email }}
           - name: SETUP_PASSWORD
             value: {{ .Values.backend.initialUser.password }}
+          - name: KRATOS_PUBLIC_URL
+            value: http://kratos-public:80
         command: ["/bin/bash", "-c"]
         args:
           - flask db upgrade;