Add clang-tidy target and fix problems

src/handlers/http.c

@@ -1,3 +1,4 @@
+#include <bsd/string.h>
 #include <string.h>
 
 #include <status.h>
@@ -21,7 +22,7 @@ add_extra_headers(char *extra_headers)
     if(extra_headers == NULL)
     {
         result = malloc(sizeof(char) * (std_headers_len + 1));
-        strcpy(result, global_config->http_server_opts.extra_headers);
+        strlcpy(result, global_config->http_server_opts.extra_headers, std_headers_len + 1);
         return result;
     }