Fix Docker build: Add build tools for insightface compilation and improve API endpoints

Dockerfile

@@ -3,10 +3,13 @@ FROM python:3.10-slim
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
 
-# System deps for OpenCV/ffmpeg
+# System deps for OpenCV/ffmpeg and build tools for insightface
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ffmpeg \
     libgl1 \
+    build-essential \
+    g++ \
+    make \
     && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app

fastapi_app.py

@@ -9,6 +9,7 @@ from io import BytesIO
 import cv2
 import numpy as np
 from fastapi import BackgroundTasks, Depends, FastAPI, File, Form, Header, HTTPException, UploadFile
+from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import JSONResponse, StreamingResponse
 
 from SinglePhoto import FaceSwapper
@@ -18,7 +19,16 @@ logger = logging.getLogger(__name__)
 
 API_KEY = os.getenv("FACE_SWAP_API_KEY")
 face_swapper = FaceSwapper()
-app = FastAPI(title="FaceSwapAll API", version="1.0.0")
+app = FastAPI(title="FaceSwapAll API", version="1.0.0", docs_url="/docs", redoc_url="/redoc")
+
+# Add CORS middleware
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
 
 
 def verify_api_key(x_api_key: str | None = Header(default=None)) -> None:
@@ -118,9 +128,37 @@ def swap_video_file(
     return output_video_path, workdir
 
 
+@app.get("/")
+def root() -> JSONResponse:
+    """Root endpoint with API information."""
+    return JSONResponse({
+        "name": "FaceSwapAll API",
+        "version": "1.0.0",
+        "status": "running",
+        "endpoints": {
+            "health": "/health",
+            "docs": "/docs",
+            "photo_swap": "/swap/photo",
+            "video_swap": "/swap/video",
+            "photo_single_src_multi_dst": "/swap/photo/single-src-multi-dst",
+            "photo_multi_src_single_dst": "/swap/photo/multi-src-single-dst",
+            "photo_multi_src_multi_dst": "/swap/photo/multi-src-multi-dst",
+            "photo_custom_mapping": "/swap/photo/custom-mapping",
+            "video_all_faces": "/swap/video/all-faces",
+            "video_custom_mapping": "/swap/video/custom-mapping",
+            "video_single_src_multi_video": "/swap/video/single-src-multi-video"
+        }
+    })
+
+
 @app.get("/health")
 def health() -> JSONResponse:
-    return JSONResponse({"status": "ok"})
+    """Health check endpoint."""
+    return JSONResponse({
+        "status": "ok",
+        "service": "FaceSwapAll API",
+        "version": "1.0.0"
+    })
 
 
 @app.post("/swap/photo")