how to use deno.json when using deno runtime in rust?

{
    "imports": {
        "zod": "npm:zod",
        "ai": "npm:ai",
        "ollama-ai-provider": "npm:ollama-ai-provider"
         // also node api like fs, fetch, etc.
    },
    "tasks": {
        "start": "deno run --allow-read --allow-write --allow-net --allow-env pipe.ts"
    }
}