title: Axios post request with proxy isn't working
body: <p><em>Without the proxy it works</em></p>
  <p>I have never worked with proxies before so I don't know what I should look out for... but  _currentURL: http://[proxy]/pathToPayments seems to be looking weird. I have no clue on what is happening though.</p>
  <pre class="lang-js prettyprint-override"><code>app.get('/payment', (req, res) =&gt; {
    const amount = req.body;
  
    const params = new URLSearchParams();
    params.append('ssl_merchant_id', MERCHANTID);
    params.append('ssl_user_id', MERCHANTUSERID);
    params.append('ssl_pin', MERCHANTPIN);
    params.append('ssl_transaction_type', 'ccsale');
    params.append('ssl_amount', 150);
  
    let axiosConfig = {
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded',
      },
      proxy: {
        host: FIXIE_URL,
        port: 80,
      },
    };
  
    axios
      .post(
        'https://api.demo.convergepay.com/hosted-payments/transaction_token',
        params,
        axiosConfig,
      )
      .then((response) =&gt; {
        return response.data;
      })
      .then((token) =&gt; {
        console.log(token);
        res.redirect(
          `https://api.demo.convergepay.com/hosted-payments?ssl_txn_auth_token=${token}`,
        );
      })
      .catch((err) =&gt; console.log(err));
  });
  </code></pre>
  <p><a href="https://i.stack.imgur.com/zgirN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/zgirN.png" alt="enter image description here" /></a>
  <a href="https://i.stack.imgur.com/7aaAH.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/7aaAH.png" alt="enter image description here" /></a></p>