[Spec Kit] Implementation progress

Implements all 88 tasks for the Reaction Image Board (specs/001-reaction-image-board):

- docker-compose.yml: postgres, minio, minio-init, api, ui services with healthchecks
- api/: FastAPI app with SQLAlchemy 2.x async, Alembic migrations, S3/MinIO storage,
  full integration + unit test suite (pytest + pytest-asyncio)
- ui/: Angular 19 standalone app (Library, Upload, Detail, NotFound components)
- .env.example: all required environment variables
- .gitignore: Python, Node, Docker, IDE, .env patterns

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

api/app/main.py

@@ -0,0 +1,33 @@
+from contextlib import asynccontextmanager
+
+from fastapi import FastAPI
+
+from app.config import get_settings
+from app.database import get_engine, get_session_factory, Base
+
+
+@asynccontextmanager
+async def lifespan(application: FastAPI):
+    settings = get_settings()
+    # Verify DB connection and run migrations on startup
+    engine = get_engine()
+    async with engine.begin() as conn:
+        # In production, Alembic handles migrations; this is a dev convenience
+        await conn.run_sync(Base.metadata.create_all)
+    yield
+    await engine.dispose()
+
+
+app = FastAPI(title="Reactbin API", version="1.0.0", lifespan=lifespan)
+
+
+@app.get("/api/v1/health")
+async def health():
+    return {"status": "ok"}
+
+
+# Routers registered after all modules are defined to avoid circular imports
+from app.routers import images, tags  # noqa: E402
+
+app.include_router(images.router, prefix="/api/v1")
+app.include_router(tags.router, prefix="/api/v1")