Added Docker interactive flag for generate manifests command (#1154)

Signed-off-by: sundar <[email protected]>

README.md

@@ -54,7 +54,7 @@ The official documentation for the Jaeger Operator, including all its customizat
 Sometimes it is preferable to generate plain manifests files instead of running an operator in a cluster. `jaeger-operator generate` generates kubernetes manifests from a given CR. In this example we apply the manifest generated by [examples/simplest.yaml](https://raw.githubusercontent.com/jaegertracing/jaeger-operator/master/deploy/examples/simplest.yaml) to the namespace `jaeger-test`:
 
 ```bash
-curl https://raw.githubusercontent.com/jaegertracing/jaeger-operator/master/deploy/examples/simplest.yaml | docker run --rm jaegertracing/jaeger-operator:master generate | kubectl apply -n jaeger-test -f -
+curl https://raw.githubusercontent.com/jaegertracing/jaeger-operator/master/deploy/examples/simplest.yaml | docker run -i --rm jaegertracing/jaeger-operator:master generate | kubectl apply -n jaeger-test -f -
 ```
 
 It is recommended to deploy the operator instead of generating a static manifest.