feat: Add initial backend application and update Dockerfile for its setup.

Dockerfile

@@ -34,16 +34,17 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
 # Create non-root user
 RUN useradd --create-home --shell /bin/bash foxy
 WORKDIR /app
+RUN chown foxy:foxy /app
 
 # Python dependencies
-COPY backend/requirements.txt ./
+COPY --chown=foxy:foxy backend/requirements.txt ./
 RUN pip install --no-cache-dir -r requirements.txt
 
 # Backend source
-COPY backend/app ./app
+COPY --chown=foxy:foxy backend/app ./app
 
 # Frontend static files (served by FastAPI)
-COPY --from=frontend-build /build/dist ./static
+COPY --chown=foxy:foxy --from=frontend-build /build/dist ./static
 
 # Healthcheck
 HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \

backend/app/main.py

@@ -9,6 +9,9 @@ from contextlib import asynccontextmanager
 
 from fastapi import FastAPI, WebSocket, WebSocketDisconnect
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
+import os
 
 from app.config import settings
 from app.database import init_db
@@ -62,6 +65,23 @@ app.include_router(logs.router)
 app.include_router(workflows.router)
 app.include_router(config.router)
 
+# ─── Static Files ─────────────────────────────────────────────────────────────
+
+if os.path.exists("static"):
+    app.mount("/assets", StaticFiles(directory="static/assets"), name="assets")
+    
+    @app.get("/{full_path:path}")
+    async def serve_spa(full_path: str):
+        # API requests should already be handled by routers
+        # If not an API request, serve index.html
+        if full_path.startswith("api/") or full_path.startswith("ws/"):
+            return None # Should not happen due to router order
+        
+        index_path = os.path.join("static", "index.html")
+        if os.path.exists(index_path):
+            return FileResponse(index_path)
+        return {"detail": "Frontend not found"}
+
 
 # ─── WebSocket ─────────────────────────────────────────────────────────────────