Disable bash login by default.

install/hst-install-debian.sh

@@ -1332,7 +1332,7 @@ fi
 # Adding admin account
 $HESTIA/bin/v-add-user admin $vpass $email default System Administrator
 check_result $? "can't create admin user"
-$HESTIA/bin/v-change-user-shell admin bash
+$HESTIA/bin/v-change-user-shell admin nologin
 $HESTIA/bin/v-change-user-language admin $lang
 
 # RoundCube permissions fix

install/hst-install-ubuntu.sh

@@ -1301,7 +1301,7 @@ fi
 # Adding Hestia admin account
 $HESTIA/bin/v-add-user admin $vpass $email default System Administrator
 check_result $? "can't create admin user"
-$HESTIA/bin/v-change-user-shell admin bash
+$HESTIA/bin/v-change-user-shell admin nologin
 $HESTIA/bin/v-change-user-language admin $lang
 
 # Configuring system IPs