Can't run AppImage from Docker container

I can't manage to run any AppImage from my docker container.

With appimagetool here is what I got:

```
$ ./appimagetool-x86_64.AppImage
bash: ./appimagetool-x86_64.AppImage: No such file or directory
```

```
$ ./appimagetool-x86_64.AppImage --appimage-extract-and-run
bash: ./appimagetool-x86_64.AppImage: No such file or directory
```

My container is based on ubuntu (tested with 16.04 & 18.04) with fuse installed