Add Dockerfile and some cleanup (#57)

Dockerfile

@@ -0,0 +1,26 @@
+FROM node:8.15.0
+
+# Install VS Code's deps. These are the only two it seems we need.
+RUN apt-get update
+RUN apt-get install -y libxkbfile-dev libsecret-1-dev
+
+# Ensure latest yarn.
+RUN npm install -g yarn
+
+# In the future, we can use https://github.com/yarnpkg/rfcs/pull/53 to make it use the node_modules
+# directly which should be faster.
+WORKDIR /src
+COPY . .
+RUN yarn
+RUN yarn task build:server:binary
+
+# We deploy with ubuntu so that devs have a familiar environemnt.
+FROM ubuntu:18.10
+RUN apt-get update
+RUN apt-get install -y openssl
+RUN apt-get install -y net-tools
+WORKDIR /root/project
+COPY --from=0 /src/packages/server/cli-linux /usr/local/bin/code-server
+EXPOSE 8443
+# Unfortunately `.` does not work with code-server.
+CMD code-server $PWD