Node.js 错误：无法检测到网络(event="noNetwork"，code=NETWORK_ERROR，version=providers5.6.8)

我想连接到ganache，我得到一个error，我不知道如何解决它.这是我的部署.js代码，它是脚本 node .js公司

    const ethers = require("ethers")
    // const solc = require("solc")
    const fs = require("fs-extra")
    
    async function main(){
        // const provider = new ethers.providers.JsonRpcProvider("http://127.0.0.1:7545");
        // const wallet = new ethers.Wallet(
        //     "1ef159aa4f7ee5116a0f22652da709ccd8d35827b12a03eb24f22dd023591987",
        //     provider
        // )
        let provider = new ethers.providers.JsonRpcProvider("http://0.0.0.0:7545")
        let wallet = new ethers.Wallet("34db8b76c03356b47da8e1dcf427a35f9c013ce95a671ce23fe96d86fe2ba44b", provider)
        const abi = fs.readFileSync("./SimpleStorage_sol_SimpleStorage.abi", "utf8");
        const binary = fs.readFileSync(
            "./SimpleStorage_sol_SimpleStorage.bin",
            "utf8"
        )
        const contractFactory = new ethers.ContractFactory(abi, binary, wallet);
        console.log("Deploying, please wait..");
        const contract = await contractFactory.deploy(); // Stop here! wait for contract to be deploy
        console.log(contract)
    
    }
    
    main()
        .then(() => process.exit(0))
        .catch((error)=>{
            console.error(error);
            process.exit(1);
        })

它产生以下error:

     Deploying, please wait..
     Error: could not detect network (event="noNetwork", code=NETWORK_ERROR, version=providers/5.6.8)
         at Logger.makeError (/home/stars/forder/blockchain/leson5/ethers-simple-storage/node_modules/@ethersproject/logger/lib/index.js:233:21)
         at Logger.throwError (/home/stars/forder/blockchain/leson5/ethers-simple-storage/node_modules/@ethersproject/logger/lib/index.js:242:20)
         at JsonRpcProvider.<anonymous> (/home/stars/forder/blockchain/leson5/ethers-simple-storage/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:561:54)
         at step (/home/stars/forder/blockchain/leson5/ethers-simple-storage/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:48:23)
         at Object.throw (/home/stars/forder/blockchain/leson5/ethers-simple-storage/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:29:53)
         at rejected (/home/stars/forder/blockchain/leson5/ethers-simple-storage/node_modules/@ethersproject/providers/lib/json-rpc-provider.js:21:65)
         at processTicksAndRejections (node:internal/process/task_queues:96:5) {
       reason: 'could not detect network',
       code: 'NETWORK_ERROR',
       event: 'noNetwork'
     }

我做错了什么？