How to make request using private networking?

Mixed Content: The page at '[...]' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint '[...]'. This request has been blocked; the content must be served over HTTPS

Mixed Content: The page at '[...]' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint '[...]'. This request has been blocked; the content must be served over HTTPS

    let url4 = "http://[service-name].railway.internal:8080/api/home";
    axios
      .post(url4)
      .then((res) => {
        const r = res.data;
        alert(r["message"]);
      })
      .catch((err) => {
        alert(url4 + err);
      });

    let url4 = "http://[service-name].railway.internal:8080/api/home";
    axios
      .post(url4)
      .then((res) => {
        const r = res.data;
        alert(r["message"]);
      })
      .catch((err) => {
        alert(url4 + err);
      });