add parsoid image

parsoid/Dockerfile

@@ -0,0 +1,28 @@
+FROM alpine:3.6
+
+ENV NODE_ENV=production \
+    GID=991 UID=991 \
+    INTERFACE=0.0.0.0 \
+    PORT=8000 \
+    ADDRESS=http://localhost/w/ \
+    DOMAIN=localhost
+
+RUN apk -U --no-cache add \
+    ca-certificates \
+    libressl \
+    nodejs-current \
+    nodejs-current-npm \
+    s6 \
+    git \
+    su-exec \
+ && git clone https://gerrit.wikimedia.org/r/p/mediawiki/services/parsoid --depth=1 \
+ && cd parsoid && npm install
+
+COPY rootfs /
+
+RUN chmod +x /usr/local/bin/* /etc/s6.d/*/* /etc/s6.d/.s6-svscan/*
+
+EXPOSE 8000
+
+ENTRYPOINT ["run.sh"]
+CMD ["/bin/s6-svscan", "/etc/s6.d"]