added template doc/INSTALL.md

doc/INSTALL.md

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+# Building Clixon
+
+Clixon runs on Linux, [FreeBSD port](https://www.freshports.org/devel/clixon) and Mac/Apple. CPU architecures include x86_64, i686, ARM32.
+
+## Ubuntu Linux
+
+### Installing dependencies
+
+Install packages
+```
+sudo apt-get update
+sudo apt-get install flex bison fcgi-dev curl-dev
+```
+
+Install and build CLIgen
+```
+    git clone https://github.com/olofhagsand/cligen.git
+    cd cligen;
+    configure;
+    make;
+    make install
+```
+
+Add a user group, using groupadd and usermod:
+```
+  sudo groupadd clicon # 
+  sudo usermod -a -G clicon <user>
+  sudo usermod -a -G clicon www-data
+```
+
+
+### Build from source
+```
+     configure	       	       # Configure clixon to platform
+     make                      # Compile
+     sudo make install         # Install libs, binaries, and config-files
+     sudo make install-include # Install include files (for compiling)
+```
+
+## Alpine Linux
+Docker is used to build Alpine Linux 
+### Build docker image
+
+## FreeBSD
+### Package install
+### Build from source
+