add: mongoose for connections and mqtt

src/models/relay.c

@@ -14,6 +14,8 @@ relay_create(uint8_t number)
     new_relay->number = number;
     new_relay->name[0] = '\0';
 
+    new_relay->is_on = -1;
+
     uuid_t off_id;
     memset(off_id, 0, sizeof(uuid_t));
     memcpy(off_id, "off", 3);