REFACTOR(repo): simplify project structure

- Move services/nextjs to nextjs/
- Move deploy/docker/Dockerfile.prod to Dockerfile
- Add GitHub Actions workflows (ci.yml, build.yml)
- Remove deploy/, services/, scripts/ folders

nextjs/app/api/documents/[id]/public/route.ts

@@ -0,0 +1,49 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { db } from '@/shared/lib/db'
+
+// GET /api/documents/[id]/public - Get a public document (no auth required)
+export async function GET(req: NextRequest) {
+  try {
+    const url = new URL(req.url)
+    const id = url.pathname.split('/')[3] // Extract ID from /api/documents/[id]/public
+
+    if (!id) {
+      return NextResponse.json(
+        { error: 'Document ID is required' },
+        { status: 400 }
+      )
+    }
+
+    // 공개된 문서만 조회 (인증 없이)
+    const document = await db.document.findFirst({
+      where: {
+        id,
+        isPublished: true, // 공개된 문서만
+        isArchived: false,
+      },
+      include: {
+        user: {
+          select: {
+            name: true,
+            email: true,
+          }
+        }
+      }
+    })
+
+    if (!document) {
+      return NextResponse.json(
+        { error: 'Document not found or not published' },
+        { status: 404 }
+      )
+    }
+
+    return NextResponse.json(document)
+  } catch (error) {
+    console.error('Error fetching public document:', error)
+    return NextResponse.json(
+      { error: 'Failed to fetch document' },
+      { status: 500 }
+    )
+  }
+}