tomcat7 : need to introduce a setenv.sh file: unable to locate the correct directory to place it.

Hi Team,
I am using rhel7.4 & tomcat7 and I need to configure it for UTF-8 encoding.

1:I managed to locate the tomcat server.xml where i need to introduce the line --> URIEncoding="UTF-8" under the Connector scope.

2:However i being told that i also need to introduce a setenv.sh file (with UTF-8 settings) as well inside the tomcat bin directory.

My setenv.sh file contents-->

echo "SETTING CUSTOM JAVA CATALINA INSTANCE ENVS; setting UTF-8 configurations;"
JRE_HOME="/user/abc/xyz/jrehome"
CATALINA_OPTS="-Dfile.encoding=UTF-8 -Xms2048M -Xmx2048M"

exit

I did a yum install tomcat but i m unable to locate the correct place where to paste my setenv.sh file.

ps:I did not install tomcat from a gz file. On my windows i did like that and everything is cool there, UTF-8 encoding is working. I am just unable to replicate the same configuration on my rh tomcat instance.