Update Dockerfile: add snort dependencies zlib, pkg-config, pcap, pcre

Dockerfile

 FROM ubuntu:16.04
 
+ENV DOWNLOAD_DIR 	/home/temp
+ENV ZLIB_VER 		1.2.11
+ENV PKG_CONFIG_VER	0.29.2
+ENV PCAP_VER		1.8.1
+ENV PCRE_VER		8.41
+ENV SSL_VER		1.1.0g
+
+
+# Needed tools
+RUN apt-get update && apt-get install -y \
+    wget
+
+# Snort Dependencies #######################################
+# Autotools, Autoconf, CMake, C++ compiler
+RUN apt-get install autotools-dev autoconf cmake g++ -y
+RUN apt-get install flex bison -y
+
+
+
+# Download packages need for snort
+RUN mkdir -p $DOWNLOAD_DIR && cd $DOWNLOAD_DIR && \
+    wget -qO- www.zlib.net/zlib-$ZLIB_VER.tar.gz | tar xvz && \
+    wget -qO- https://pkg-config.freedesktop.org/releases/pkg-config-$PKG_CONFIG_VER.tar.gz | tar xvz && \
+    wget -qO- http://www.tcpdump.org/release/libpcap-$PCAP_VER.tar.gz | tar xvz && \
+    wget -qO- ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-$PCRE_VER.tar.gz | tar xvz && \
+    wget -qO- https://www.openssl.org/source/openssl-$SSL_VER.tar.gz | tar xvz 
+
+
+# Zlib
+WORKDIR $DOWNLOAD_DIR/zlib-$ZLIB_VER
+RUN ./configure && make && make install
+
+# Pkg Config
+WORKDIR $DOWNLOAD_DIR/pkg-config-$PKG_CONFIG_VER
+RUN ./configure --with-internal-glib && make && make install
+
+# PCAP
+WORKDIR $DOWNLOAD_DIR/libpcap-$PCAP_VER
+RUN ./configure && make && make install
+
+# PCRE
+WORKDIR $DOWNLOAD_DIR/pcre-$PCRE_VER
+RUN ./configure && make && make install
+
+
+WORKDIR /home/$DOWNLOAD_DIR
 CMD ["/bin/bash"]