feat: bathPath 설정 추가

Author: kickbelldev

next.config.ts

@@ -5,6 +5,7 @@ import remarkFrontmatter from 'remark-frontmatter'
 import remarkMdxFrontmatter from 'remark-mdx-frontmatter'
 
 const nextConfig: NextConfig = {
+  basePath: '/blog',
   pageExtensions: [
     'js',
     'jsx',