Add foo.ino

this is the main project/sketch file (taken from https://github.com/usini/usini_discord_webhook/blob/main/examples/helloworld/helloworld.ino)

foo.ino

@@ -0,0 +1,16 @@
+#include <Discord_WebHook.h>
+
+Discord_Webhook discord;
+String DISCORD_WEBHOOK = "https://discord.com/api/webhooks/id/token"; // insert your webhook here
+
+void setup() {
+  Serial.begin(115200);
+  discord.begin(DISCORD_WEBHOOK); // init
+  discord.addWiFi("WiFiName","WiFiPassword"); // update this line to best fit you
+  discord.connectWiFi();
+  discord.send("Hello World");
+}
+
+void loop() {
+
+}