Add Dockerfile for building Yarn (#2628)

* Add Dockerfile for building Yarn

* Use Node.js 7.x

* Don't send any files to Docker daemon

* Remove Debian comment

.dockerignore

@@ -0,0 +1,3 @@
+# None of the files (other than the Dockerfile) are required to build the Docker
+# container, so we don't need to send *any* files to the Docker daemon.
+*

Dockerfile

@@ -0,0 +1,42 @@
+# Dockerfile for building Yarn.
+
+FROM ubuntu:16.04
+MAINTAINER Daniel Lo Nigro <[email protected]>
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Add Yarn package repo - We require Yarn to build Yarn itself :D
+ADD https://dl.yarnpkg.com/debian/pubkey.gpg /tmp/yarn-pubkey.gpg
+RUN apt-key add /tmp/yarn-pubkey.gpg && rm /tmp/yarn-pubkey.gpg
+RUN echo "deb http://dl.yarnpkg.com/debian/ stable main" > /etc/apt/sources.list.d/yarn.list
+
+# Add NodeSource Node.js repo for newer Node.js version
+ADD https://deb.nodesource.com/setup_7.x /tmp/nodesource-setup.sh
+RUN chmod +x /tmp/nodesource-setup.sh && /tmp/nodesource-setup.sh && rm /tmp/nodesource-setup.sh
+
+# Debian packages
+RUN apt-get -y update && \
+  apt-get install -y --no-install-recommends \
+    build-essential \
+    fakeroot \
+    gcc \
+    git \
+    lintian \
+    make \
+    nodejs \
+    rpm \
+    ruby \
+    ruby-dev \
+    unzip \
+    yarn \
+  && \
+  apt-get clean && \
+  rm -rf /var/lib/apt/lists/*
+
+# Ruby packages
+RUN gem install fpm
+
+### Custom apps
+# ghr (just needed for releases, could probably be optional)
+ADD https://github.com/tcnksm/ghr/releases/download/v0.5.0/ghr_v0.5.0_linux_amd64.zip /tmp/ghr.zip
+RUN unzip /tmp/ghr.zip -d /usr/local/bin/ && rm /tmp/ghr.zip