DL3007 warning: Using latest is prone to errors if the image will ever update. Pin the version explicitly to a release tag

DL3018 warning: Pin versions in apk add. Instead of `apk add <package>` use `apk add <package>=<version>`

DL3019 info: Use the `--no-cache` switch to avoid the need to use `--update` and remove `/var/cache/apk/*` when done installing packages

DL3008 warning: Pin versions in apt get install. Instead of `apt-get install <package>` use `apt-get install <package>=<version>`

DL3009 info: Delete the apt-get lists after installing something