nginx/nginx-config.sh

#!/bin/bash
export DOLAR='$'

for fn in `ls /etc/nginx/conf.d/*.conf.tpl`; do
    # remove .conf.tpl
    fnn=${fn:0:(-9)}
    # get the name of file
    name=${fnn##*/}
    # apply uppercase
    name=${name^^}
    # generete string to find
    host_name="HOST_${name}="
    # greo in host.env
    module=$(set | grep ${host_name} | head -1)
    # get the url access
    value=${module##*=}
    # get length
    exist=${#value}
    if [ "${exist}" != "0" ];
    then
	echo "--------------------------------------------------------------------------------------"
        echo "Config file -> " ${fn:0:(-4)}
        # module is installed
    	envsubst < $fn > ${fn:0:(-4)}
        cat ${fn:0:(-4)}
    else
	echo "--------------------------------------------------------------------------------------"
        echo "VARIABLE IS NOT DEFINED IN FILE host.env -> $fn"
    fi
done

nginx -g "daemon off;"