Add Reddit monitoring bot — backend, frontend, and Docker config

Python/FastAPI backend with PostgreSQL for collecting Reddit data via
public .json endpoints. React/Vite dashboard for analytics. Docker Compose
setup with API and worker services connecting to shared PostgreSQL.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/main.py

@@ -0,0 +1,39 @@
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+from fastapi.staticfiles import StaticFiles
+from fastapi.responses import FileResponse
+
+from backend.database import engine
+from backend.routers import health, subreddits, posts, comments, authors, analytics, digests, summaries
+
+
+@asynccontextmanager
+async def lifespan(app: FastAPI):
+    yield
+    await engine.dispose()
+
+
+app = FastAPI(title="Reddit Monitor", lifespan=lifespan)
+
+# API routes
+app.include_router(health.router, prefix="/api/v1")
+app.include_router(subreddits.router, prefix="/api/v1")
+app.include_router(posts.router, prefix="/api/v1")
+app.include_router(comments.router, prefix="/api/v1")
+app.include_router(authors.router, prefix="/api/v1")
+app.include_router(analytics.router, prefix="/api/v1")
+app.include_router(digests.router, prefix="/api/v1")
+app.include_router(summaries.router, prefix="/api/v1")
+
+
+# SPA static file serving (only when frontend is built)
+import os
+
+static_dir = os.path.join(os.path.dirname(__file__), "..", "static")
+if os.path.isdir(static_dir):
+    app.mount("/assets", StaticFiles(directory=os.path.join(static_dir, "assets")), name="assets")
+
+    @app.get("/{full_path:path}")
+    async def serve_spa(full_path: str):
+        return FileResponse(os.path.join(static_dir, "index.html"))