initial - add implementation for simple crowdsec app to list and delete non-CAPI decisions

app/main.py

@@ -0,0 +1,21 @@
+from fastapi import FastAPI, Request
+from fastapi.responses import HTMLResponse
+from fastapi.templating import Jinja2Templates
+from app.api import router as api_router
+from app.crowdsec_api import list_decisions
+
+app = FastAPI(title="CrowdSec Web UI")
+
+# Include API
+app.include_router(api_router, prefix="/api")
+
+# Templates
+templates = Jinja2Templates(directory="app/templates")
+
+
+@app.get("/", response_class=HTMLResponse)
+async def index(request: Request):
+    decisions = await list_decisions()
+    return templates.TemplateResponse(
+        "index.html", {"request": request, "decisions": decisions}
+    )