Fix MQTT_RELAY compile error due missing #define BUTTON1_MODE

code/espurna/config/hardware.h

@@ -383,6 +383,7 @@
     #define DEVICE              "MQTT_RELAY"
     #define BUTTON1_PIN         0
     #define BUTTON1_RELAY       1
+    #define BUTTON1_MODE        BUTTON_PUSHBUTTON | BUTTON_DEFAULT_HIGH
     #define RELAY1_PIN          12
     #define RELAY1_PIN_INVERSE  0
     #define LED1_PIN            16