Update README.md for docker builds

Author: Gabriele Iannetti

README.md

@@ -47,7 +47,7 @@ A Debian container is based on the offical golang:1.17.5-bullseye container imag
 sudo docker build  --tag lustre_exporter -f docker/Dockerfile .
 sudo docker run --rm -v $PWD:/cpy -it lustre_exporter
 ```
-The binary will be available in `build/lustre_exporter-X.X.X`.
+The binary will be available in the repositories `build` directory.
 
 #### RPM Build Container
 
@@ -58,7 +58,7 @@ A CentOS7 container is based on the official CentOS7 container image for providi
 sudo docker build -t rpm_dock -f docker/RPM-Dockerfile .
 sudo docker run --rm -v $PWD:/rpm -it rpm_dock
 ```
-The RPM package will be available in `build/x86_64/prometheus-lustre-exporter-X.X.X-1.0.el7.x86_64.rpm`.
+The RPM package will be available in the repositories `build` directory.
 
 ## Running