diff --git a/INSTALL.md b/INSTALL.md
index de13ef5..6171da4 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -8,11 +8,11 @@ Step by step approach on how to setup and run an openLDAP server on a systemd-le
 build ldapdock from the dockerfile and run into it, creating the proper volumes to save databases data, config data, and certs data
 
 ```
-> docker build -t ldapdock /path/to/dockerfile
+> docker build -t ldapdock --build-arg LDAP_HOST=example.com .
 ```
 
 ```
-> docker run -i -t -p 389:389 -p 636:636 -h example.com -v ldap_data:/var/lib/ldap -v ldap_config:/etc/ldap/slapd.d -v ldap_certs:/etc/ldap/certs -v $(pwd)/host-certs:/export-certs ldapdock
+> docker run -i -t -p 389:389 -p 636:636 -h ${LDAP_HOST:-example.com} -v ldap_data:/var/lib/ldap -v ldap_config:/etc/ldap/slapd.d -v ldap_certs:/etc/ldap/certs -v $(pwd)/host-certs:/export-certs ldapdock
 ```
 
 ## _2- Run the openLDAP server and populate a directory_
@@ -92,9 +92,9 @@ changetype: add
 objectClass: olcOverlayConfig
 objectClass: olcPPolicyConfig
 olcOverlay: ppolicy
-olcPPolicyDefault: cn=default,ou=policies,dc=example,dc=com
 EOF
 ```
+<!--olcPPolicyDefault: cn=default,ou=policies,dc=example,dc=com-->
 ```
 ldapadd -Q -Y EXTERNAL -H ldapi:/// -f enable_ppolicy.ldif
 ```
@@ -297,7 +297,7 @@ Server template
 ```
 root@example:/etc/ldap/certs# cat > ldap01.info <<EOF
 organization = Example Company
-cn = example.com
+cn = ${LDAP_HOST}
 tls_www_server
 encryption_key
 signing_key
@@ -366,21 +366,21 @@ root@example:/etc/ldap/certs# source ~/.bashrc
 \
 Check STARTTLS
 ```
-root@example:/etc/ldap/certs# ldapwhoami -x -ZZ -H ldap://example.com
+root@example:/etc/ldap/certs# ldapwhoami -x -ZZ -H ldap://${LDAP_HOST}
 ```
 Check SSL/ldaps
 ```
-root@example:/etc/ldap/certs# ldapwhoami -x -H ldaps://example.com
+root@example:/etc/ldap/certs# ldapwhoami -x -H ldaps://${LDAP_HOST}
 ```
 Both should return Anonymous.
 
 Another example to try STARTTLS/ldap it is working:
 ```
-openssl s_client -connect 127.0.0.1:389 -starttls ldap -servername example.com
+openssl s_client -connect ${LDAP_HOST}:389 -starttls ldap -servername ${LDAP_HOST}
 ```
 SSL/ldaps
 ```
-openssl s_client -connect example.com:636 -servername example.com
+openssl s_client -connect ${LDAP_HOST}:636 -servername ${LDAP_HOST}
 ```
 Both will show the connection to the openLDAP server showing the CN(dc=example,dc=com)
 
@@ -391,6 +391,6 @@ If asked, accept the certificate as with any certificate, or copy the CA file th
 > sudo cp mycacert.crt /usr/local/share/ca-certificates/
 > sudo update-ca-certificates
 ```
-In both cases by default the login "user" and password are:\
+In both cases, providing -h ${LDAP_HOST}, by default the login "user" and password are:\
 BIND DN=cn=admin,dc=example,dc=com\
 BIND password=admin