Add initial project setup with Docker, GitHub Actions, and meal timetable functionality

- Create Dockerfile for multi-stage build
- Set up GitHub Actions workflow for CI/CD
- Implement meal and timetable fetching logic
- Add README and configuration files
- Include cron job for scheduled execution
- Establish .gitignore for build artifacts and environment files

app/index.ts

@@ -0,0 +1,48 @@
+import { Weekday } from "@imnyang/comcigan.ts";
+import { Meal, Timetable } from "./lib/discord";
+
+async function main() {
+  // Tomorrow is 1st of the month
+  const tomorrow = new Date();
+  tomorrow.setDate(tomorrow.getDate() + 1);
+  const YYMMDD = tomorrow.toISOString().slice(0, 10).replace(/-/g, "").toString();
+  // const YYMMDD = "20250306";
+  const weekday = tomorrow.getDay() === 0 ? 6 : tomorrow.getDay() - 1;
+  // const weekday = 4;
+
+  console.log("📅 | date:", YYMMDD);
+  console.log("📅 | weekday:", weekday);
+  console.timeLog("⏱️ | sunrint");
+  await Timetable({
+    schoolId: 41896,
+    grade: 1,
+    classNum: 1,
+    weekday: Weekday.Friday,
+    WEBHOOK_URL: process.env.DISCORD_WEBHOOK_SUNRIN_URL as string
+  })
+  await Meal({
+    MLSV_YMD: YYMMDD,
+    ATPT_OFCDC_SC_CODE: "B10",
+    SD_SCHUL_CODE: "7010536",
+    username: "@today.sunrin",
+    schoolName: "선린인터넷고등학교",
+    WEBHOOK_URL: process.env.DISCORD_WEBHOOK_SUNRIN_URL as string
+  }); // 선린인고
+  console.timeEnd("⏱️ | sunrint");
+
+  console.timeLog("⏱️ | sangjeong");
+  await Meal({
+    MLSV_YMD: YYMMDD,
+    ATPT_OFCDC_SC_CODE: "B10",
+    SD_SCHUL_CODE: "7010536",
+    username: "@today.isangjeong",
+    schoolName: "상정고등학교",
+    WEBHOOK_URL: process.env.DISCORD_WEBHOOK_SANGJEONG_URL as string
+  }); // 상정고
+  console.timeEnd("⏱️ | sangjeong");
+};
+
+main().catch((error) => {
+  console.error("Error in main function:", error);
+  process.exit(1);
+});