add logging code and get it setup

logging.h

@@ -0,0 +1,21 @@
+#include <pthread.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <time.h>
+
+#define LOG_FILE_NAME "./logs/log.txt"
+
+#define LOG_DEBUG 0
+#define LOG_INFO 1
+#define LOG_WARN 2
+#define LOG_ERROR 3
+
+void set_log_level(int level);
+
+void log_message(int level, const char* fmt, ...);
+
+void open_log_file();
+
+void close_log_file();