feat: Docker deploy serving SPA and API on :8080

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/app/main.py

@@ -1,7 +1,10 @@
 import asyncio
 from contextlib import asynccontextmanager
+from pathlib import Path
 
-from fastapi import FastAPI
+from fastapi import FastAPI, HTTPException
+from fastapi.responses import FileResponse
+from fastapi.staticfiles import StaticFiles
 
 from app.api.admin import router as admin_router
 from app.api.public import router as public_router
@@ -11,6 +14,20 @@ from app import models  # noqa: F401 — register models with Base.metadata
 from app.services import cleaner as cleaner_service
 
 
+def _resolve_frontend_dist() -> Path | None:
+    """Locate frontend/dist in Docker (/app/frontend/dist) or monorepo checkout."""
+    here = Path(__file__).resolve()
+    candidates = (
+        here.parents[2] / "frontend" / "dist",  # .../backend/app/main.py → repo root
+        here.parents[1] / "frontend" / "dist",  # /app/app/main.py → /app/frontend/dist
+        Path("/app/frontend/dist"),
+    )
+    for path in candidates:
+        if (path / "index.html").is_file():
+            return path
+    return None
+
+
 async def _cleaner_loop() -> None:
     while True:
         db = SessionLocal()
@@ -47,3 +64,19 @@ app.include_router(admin_router)
 @app.get("/api/health")
 def health():
     return {"ok": True, "name": "MincedPad"}
+
+
+_dist = _resolve_frontend_dist()
+if _dist is not None:
+    assets_dir = _dist / "assets"
+    if assets_dir.is_dir():
+        app.mount("/assets", StaticFiles(directory=assets_dir), name="assets")
+
+    @app.api_route("/{full_path:path}", methods=["GET", "HEAD"])
+    async def spa(full_path: str):
+        if full_path == "api" or full_path.startswith("api/"):
+            raise HTTPException(status_code=404, detail="Not Found")
+        file_path = _dist / full_path
+        if full_path and file_path.is_file():
+            return FileResponse(file_path)
+        return FileResponse(_dist / "index.html")