fix script and code

entrypoint.sh

@@ -21,7 +21,6 @@ trap 'kill ${!}; run_stop 15' SIGINT
 pid="$!"
 
 # wait forever
-while true
-do
-  tail -f /dev/null & wait ${!}
-done
+wait "$pid"
+pid=0
+run_stop 1

main.cpp

@@ -126,7 +126,7 @@ auto get_var(const char* varname, bool required = true) {
     return value;
 }
 
-auto get_var_number(const char* varname, bool required = true) {
+auto get_var_number(const char* varname, bool required = false) {
     auto value = get_var(varname, required);
     if (value == nullptr) return 0;
     return atoi(value);