add doc link for each library

the-cup.ino

@@ -13,14 +13,14 @@
 
 #include <WiFiManager.h> // https://github.com/tzapu/WiFiManager
 
-#include <ESP8266WiFi.h>
+#include <ESP8266WiFi.h> // https://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/readme.html
 #include <ESP8266HTTPClient.h>
 #include <WiFiClientSecureBearSSL.h>
 
 // #include "certs.h"
 
 
-#include <MFRC522v2.h>
+#include <MFRC522v2.h> // https://github.com/OSSLibraries/Arduino_MFRC522v2
 #include <MFRC522DriverSPI.h>
 #include <MFRC522DriverPinSimple.h>
 #include <MFRC522Debug.h>
@@ -35,30 +35,13 @@ MFRC522DriverSPI driver_1{ss_1_pin};
 MFRC522 reader{driver_1};   // Create MFRC522 instance.
 
 void setup() {
-  // WiFi.mode(WIFI_STA); // explicitly set mode, esp defaults to STA+AP
-  // it is a good practice to make sure your code sets wifi mode how you want it.
-
-  // put your setup code here, to run once:
   Serial.begin(115200);
 
   pinMode(LED_PIN, OUTPUT);
   displaySuccess();
 
-  //WiFiManager, Local intialization. Once its business is done, there is no need to keep it around
   WiFiManager wm;
-
-  // reset settings - wipe stored credentials for testing
-  // these are stored by the esp library
-  // wm.resetSettings();
-
-  // Automatically connect using saved credentials,
-  // if connection fails, it starts an access point with the specified name ( "AutoConnectAP"),
-  // if empty will auto generate SSID, if password is blank it will be anonymous AP (wm.autoConnect())
-  // then goes into a blocking loop awaiting configuration and will return success result
-
   bool res;
-  // res = wm.autoConnect(); // auto generated AP name from chipid
-  // res = wm.autoConnect("AutoConnectAP"); // anonymous ap
   res = wm.autoConnect("KLUK"); // password protected ap
 
   if(!res) {