Add docker file varnish

Author: zeroc0d3

varnish/Dockerfile

@@ -0,0 +1,26 @@
+FROM debian:latest
+MAINTAINER ZeroC0D3 Team<zeroc0d3.team@gmail.com>
+
+# Set Environment Variables
+ENV DEBIAN_FRONTEND noninteractive
+
+# Install Dependencies
+RUN apt-get update && apt-get install -y apt-utils && apt-get upgrade -y
+RUN mkdir /home/site && mkdir /home/site/cache
+RUN apt-get install -y varnish
+RUN rm -rf /var/lib/apt/lists/*
+
+# Setting Configurations
+ENV VARNISH_CONFIG  /etc/varnish/default.vcl
+ENV CACHE_SIZE      128m
+ENV VARNISHD_PARAMS -p default_ttl=3600 -p default_grace=3600
+ENV VARNISH_PORT    6081
+ENV BACKEND_HOST    localhost
+ENV BACKEND_PORT    80
+
+ADD default.vcl /etc/varnish/default.vcl
+ADD start.sh /etc/varnish/start.sh
+
+RUN chmod +x /etc/varnish/start.sh
+
+CMD ["/etc/varnish/start.sh"]