Building container for https://github.com/be5invis/Iosevka

Dockerfile

FROM ubuntu

RUN apt-get update
RUN apt-get install -y build-essential curl

# NodeJS >= 6.0
RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
RUN apt-get install -y nodejs

# ttfautohint
RUN apt-get install -y ttfautohint

# otfcc depends on premake5
WORKDIR /tmp
RUN curl -sLo premake5.tar.gz https://github.com/premake/premake-core/releases/download/v5.0.0-alpha11/premake-5.0.0-alpha11-linux.tar.gz
RUN tar xvf premake5.tar.gz && mv premake5 /usr/local/bin/premake5 && rm premake5.tar.gz

# otfcc
WORKDIR /tmp
RUN curl -sLo otfcc.tar.gz https://github.com/caryll/otfcc/archive/v0.8.4.tar.gz
RUN tar xvf otfcc.tar.gz && mv otfcc-0.8.4 otfcc
WORKDIR /tmp/otfcc
RUN premake5 gmake && cd build/gmake && make config=release_x64
WORKDIR /tmp/otfcc/bin/release-x64
RUN mv otfccbuild /usr/local/bin/otfccbuild
RUN mv otfccdump /usr/local/bin/otfccdump
WORKDIR /tmp
RUN rm -rf otfcc/ otfcc.tar.gz

Hi! I've not actually used docker before so I have a quick question on this - - does it need to be on Ubuntu to run? And what should this file be named as in order for the first command, building the docker image, to work?