Docker npm Segmentation fault

Hi there!

I am running docker-ce on alpine 3.6.2-extend. Any other docker container runs ok but node related images container.
I want to create a ghost blog contaner, but it still can not starting. There is a fail echo 'Segmentation fault' when I into the container and run `npm -v` cmd.

Anybody knows why? How to fix it ?

----
I found a method to fix this problem. Because nodejs needs `paxctl` package. Reference: https://github.com/nodejs/docker-node/issues/588

so We have to build a new image base on ghost:alpine, the Dockerfile content is:

```
FROM ghost:alpine
RUN apk add --no-cache paxctl && paxctl -cm `which node`
```