Use sudo inside Dockerfile (Alpine)

Question

I have this Dockerfile ...

FROM keymetrics/pm2:latest-alpine

RUN apk update && \
    apk upgrade && \
    apk add \
       bash

COPY . ./

EXPOSE 1886 80 443

CMD pm2-docker start --auto-exit --env ${NODE_ENV} ecosystem.config.js

How can I execute the CMD command using sudo ?

I need to do this because the port 443 is allowed only for sudo user.