feat(docker): add SPA static file serving and fix Dockerfile paths\n\n- Add backend/app/main_spa.py with FastAPI static file serving for SPA\n- Fix Dockerfile.traefik to use correct backend path (backend.app.main_spa)\n- Remove web/ references (project has backend/ at root)\n- Frontend dist files served from /app/frontend/dist\n- Health check endpoint at /health\n- Supports Traefik reverse proxy at bttiaw.hzau.edu.cn\n\nCo-Authored-By: Claude <noreply@anthropic.com>

backend/app/main_spa.py

@@ -0,0 +1,72 @@
+"""FastAPI 主应用 - with SPA static file serving"""
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
+from pathlib import Path
+from contextlib import asynccontextmanager
+
+from .config import settings
+from .api.v1 import jobs, upload, results, tasks
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    """应用生命周期管理"""
+    # 启动时
+    print("🚀 Starting BtToxin Pipeline API...")
+    yield
+    # 关闭时
+    print("👋 Shutting down BtToxin Pipeline API...")
+
+
+app = FastAPI(
+    title=settings.APP_NAME,
+    version=settings.APP_VERSION,
+    description="Automated Bacillus thuringiensis toxin mining pipeline",
+    lifespan=lifespan
+)
+
+# CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=settings.CORS_ORIGINS,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+# 路由
+app.include_router(jobs.router, prefix=f"{settings.API_V1_STR}/jobs", tags=["jobs"])
+app.include_router(tasks.router, prefix=f"{settings.API_V1_STR}/tasks", tags=["tasks"])
+app.include_router(upload.router, prefix=f"{settings.API_V1_STR}/upload", tags=["upload"])
+app.include_router(results.router, prefix=f"{settings.API_V1_STR}/results", tags=["results"])
+
+
+@app.get("/")
+async def root():
+    return {
+        "name": settings.APP_NAME,
+        "version": settings.APP_VERSION,
+        "status": "healthy"
+    }
+
+
+@app.get("/health")
+async def health():
+    return {"status": "ok"}
+
+
+# Mount static files for frontend (in production)
+# The frontend dist files are served from /app/frontend/dist in the container
+frontend_dist_path = Path("/app/frontend/dist")
+if frontend_dist_path.exists():
+    app.mount("/assets", StaticFiles(directory=str(frontend_dist_path / "assets")), name="assets")
+
+    @app.get("/{full_path:path}", include_in_schema=False)
+    async def serve_spa(full_path: str):
+        """Serve frontend SPA - all routes go to index.html"""
+        file_path = frontend_dist_path / full_path
+        if file_path.exists() and file_path.is_file():
+            return FileResponse(file_path)
+        return FileResponse(frontend_dist_path / "index.html")