refactor: Dockerfile for VSTS

tools/build/Dockerfile

@@ -0,0 +1,15 @@
+FROM node:8-alpine
+LABEL maintainer="requarks.io"
+
+RUN apk update && \
+    apk add bash curl git openssh supervisor --no-cache && \
+    mkdir -p /var/wiki
+
+WORKDIR /var/wiki
+
+COPY supervisord.conf /etc/supervisord.conf
+COPY . /var/wiki
+
+EXPOSE 3000
+
+CMD ["supervisord", "--nodaemon", "-c", "/etc/supervisord.conf"]