Fixing various build errors. Activated minimal build

Provider/CMakeLists.txt

@@ -3,4 +3,5 @@
 cmake_minimum_required(VERSION 3.16)
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+idf_build_set_property(MINIMAL_BUILD ON)
 project(Provider)

Provider/main/CMakeLists.txt

@@ -1,5 +1,9 @@
 idf_component_register(SRCS  "main.cpp"
-                    INCLUDE_DIRS ".")
+                            # Needed as we use minimal build
+                            PRIV_REQUIRES esp_http_server esp_eth
+                             esp_wifi nvs_flash esp_netif vfs
+                             json app_update esp_timer
+        INCLUDE_DIRS ".")
 
 if(CONFIG_CALENDINK_DEPLOY_WEB_PAGES)
     set(WEB_SRC_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../frontend")

Provider/main/main.cpp

@@ -2,7 +2,6 @@
 #include <stdio.h>
 
 // SDK
-#include "driver/gpio.h"
 #include "esp_log.h"
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"