another try

api-gateway.yml

     gateway:
       routes:
         - id: customer
-          uri: http://localhost:8081
+          uri: http://localhost:8081/
           predicates:
             - Path=/customer/**
-          filters:
-            - StripPrefix=1
-
         - id: account
-          uri: http://localhost:8082
+          uri: http://localhost:8082/
           predicates:
             - Path=/account/**