[mirotalksfu] - add microphone volume indicator

public/views/Room.html

@@ -321,6 +321,13 @@ access to use this app.
                         </div>
                         <select id="microphoneSelect" class="form-select text-light bg-dark"></select>
                         <br />
+                        <div id="volumeContainer">
+                            <div id="volumeBar">
+                                <div id="volumeLevel"></div>
+                            </div>
+                            <!-- <span id="volumeText">0%</span> -->
+                        </div>
+                        <br />
                         <div id="speakerSelectDiv">
                             <div class="title">
                                 <i class="fas fa-headphones"></i>