Permission and npm issues building and running docker image

[wezell]

We have 2 issues building and running our current docker image.

1. Building from src fails because alpine bumped up the node version they install via apk in their 3.9 image which we do not support.

docker build --build-arg BUILD_FROM=COMMIT --build-arg BUILD_ID=origin/master -t dotcms-test .

2. Once the docker image is created, it fails to run in different environments due to permissions issues on startup. This is reproducible on my local docker install (OS-X / brew) and on Amazon's Linux2 install.

[nollymar]

I have experienced that issue several times. The only way I found to make it work was changing the alpine version, it failed sporadically and I couldn't find the reason