feat: add set logfile to stdout cmd

abra.sh

@@ -47,6 +47,10 @@ set_trusted_proxies() {
     set_system_config trusted_proxies "$trusted_proxies"
 }
 
+set_logfile_stdout() {
+    set_system_config logfile '/dev/stdout'
+}
+
 install_bbb() {
     install_apps bbb
     set_app_config bbb app.navigation true