Alpine is a small image, however, due to imcompatibility with vscode gitpod doesn't support it
Current main difference with ubuntu is alpine uses adduser
RUN addgroup -g 33333 -S gitpod && adduser --disabled-password --uid 33333 --ingroup gitpod --home /home/gitpod --shell /bin/bash gitpod \
&& echo 'gitpod:gitpod' | chpasswd