add Dockerfile

Dockerfile

@@ -0,0 +1,2 @@
+FROM nginx:alpine
+RUN printf "<!doctype html><meta charset=utf-8><title>jskim</title><h1>jskim workspace ready</h1><p>jskim.vexplor.com — push your app (replace this Dockerfile). DB wired to pg-jskim.</p>" > /usr/share/nginx/html/index.html