add caddy server.

caddy/Dockerfile

@@ -0,0 +1,20 @@
+FROM alpine:3.4
+MAINTAINER Eric Pfeiffer <computerfr33k@users.noreply.github.com>
+
+LABEL caddy_version="0.9.0" architecture="amd64"
+
+RUN apk add --update openssh-client tar curl
+
+RUN curl --silent --show-error --fail --location \
+      --header "Accept: application/tar+gzip, application/x-gzip, application/octet-stream" -o - \
+      "https://github.com/mholt/caddy/releases/download/v0.9.0/caddy_linux_amd64.tar.gz" \
+    | tar --no-same-owner -C /usr/bin/ -xz caddy_linux_amd64 \
+ && mv /usr/bin/caddy_linux_amd64 /usr/bin/caddy \
+ && chmod 0755 /usr/bin/caddy \
+ && /usr/bin/caddy -version
+
+EXPOSE 80 443 2015
+WORKDIR /var/www/laravel/public
+
+ENTRYPOINT ["caddy"]
+CMD ["-conf", "/etc/Caddyfile"]