added dockerfile

Dockerfile

@@ -0,0 +1,11 @@
+FROM node:alpine
+
+EXPOSE 1337
+
+WORKDIR /var/www
+COPY package.json /var/www/
+RUN npm install
+COPY html_table_to_markdown.js /var/www
+COPY url_to_markdown_apple_dev_docs.js /var/www
+COPY url_to_markdown_common_filters.js /var/www
+COPY index.js /var/www/