CHORE(merge): merge from develop

- Initial setup and all features from develop branch
- Includes: auth, deploy, docker, style fixes
- K3S deployment configuration

nextjs/next.config.ts

@@ -0,0 +1,33 @@
+import type { NextConfig } from "next";
+import { config } from "dotenv";
+import { resolve } from "path";
+
+// Load .env file from the parent directory (jaejadle folder)
+config({ path: resolve(__dirname, "../../.env") });
+
+const nextConfig: NextConfig = {
+  output: "standalone",
+  images: {
+    unoptimized: true, // 런타임 최적화 비활성화 (이미 최적화된 이미지 사용)
+    remotePatterns: [
+      {
+        protocol: "https",
+        hostname: "s3.minio0213.kro.kr",
+      },
+      {
+        protocol: "https",
+        hostname: "*.s3.*.amazonaws.com", // AWS S3 (모든 리전)
+      },
+      {
+        protocol: "https",
+        hostname: "s3.*.amazonaws.com", // AWS S3 path-style
+      },
+      {
+        protocol: "https",
+        hostname: "img.youtube.com",
+      },
+    ],
+  },
+};
+
+export default nextConfig;