added docker file and remove dashboard

app/main.py

@@ -1,6 +1,4 @@
 from fastapi import FastAPI
-from fastapi.staticfiles import StaticFiles
-from fastapi.responses import FileResponse
 from app.routers import nodes, pods, metrics
 
 app = FastAPI(title="k3s Health Dashboard")
@@ -9,13 +7,6 @@ app.include_router(nodes.router)
 app.include_router(pods.router)
 app.include_router(metrics.router)
 
-app.mount("/static", StaticFiles(directory="dashboard/static"), name="static")
-
-
-@app.get("/")
-def serve_ui():
-    return FileResponse("dashboard/index.html")
-
 
 @app.get("/health")
 def health():