Sending notification from linux servers

My Rocket chat server is 0.73.2

I’d like to change the way that my linux servers send me notifications (today by mail).

Id’d like texte messages could be send to a special canal in rocket chat.

I now that could be done using API, but i’m really newbie around API stuff, i already read the documentation, but for me seems not enough to understand.

If possible i’d like to use simple request with curl and tokens: like that:

curl -H "X-Auth-Token: 9HqLlyZOugoStsXCUfD_0YdwnNnunAJF8V47U3QHXSq" \
     -H "X-User-Id: aobEdbYhXfu5hkeqG" \
     -H "Content-type:application/json" \
     http://localhost:3000/api/v1/chat.postMessage \
     -d '{ "channel": "#infra", "text": "This is a test!" }'

Result of this command give me

```a very long result starting with : 
    <!DOCTYPE html>
    <meta name="referrer" content="origin-when-crossorigin">
    <script>/* eslint-disable */

    'use strict';
    (function() {
    	var debounce = function debounce(func, wait, immediate) {
    		var timeout = void 0;
    		return function () {
    			var _this = this;

    			for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
    				args[_key] = arguments[_key];

    			var later = function later() {
    				timeout = null;
    				!immediate && func.apply(_this, args);