/ bin / sh: apt-get: no encontrado

Estoy intentando cambiar un dockerFile para que funcione con aspell. Tengo un script de bash que quiero envolver en un dock

Step 4: Wrap the script in a Docker container.

The sample SDK we downloaded earlier contains an example of an action wrapped in a Docker container. In particular, the sample SDK includes a Dockerfile that builds the C program in client/example.c and installs the binary as /blackbox/client/action .

The key line in the sample Dockerfile is:

RUN cd /blackbox/client; gcc -o action example.c

Instead of compiling example.c and installing the binary as an action, we’ll change the Dockerfile to install aspell into the Linux environment, and then install our action.sh script as the executable action command.

To do so, we delete the RUN command above, and insert the following commands into the Dockerfile:

RUN apt-get install -y aspell
RUN rm -f /blackbox/client/action
ADD action.sh /blackbox/client/action

Estoy tratando de hacer esto en el dockerfile de abajo

# Dockerfile for example whisk docker action
FROM openwhisk/dockerskeleton

ENV FLASK_PROXY_PORT 8080

### Add source file(s)
ADD example.c /action/example.c

RUN sudo apt-get install -y aspell
RUN rm -f /blackbox/client/action
ADD action.sh /blackbox/client/action



CMD ["/home/huseyin/bin", "-c", "cd actionProxy && python -u actionproxy.py"]

El tutorial está desactualizado, por lo que no puedo hacerlo con éxito. ¿Puedes ayudarme?