docs: update README with improved Docker commands and add credits section

feat: enhance WebRTC stats collection by logging connection state changes

webrtc-internals-exporter/override.js

@@ -40,6 +40,9 @@ class WebrtcInternalExporter {
     pc.iceCandidateErrors = [];
     this.peerConnections.set(id, pc);
     pc.addEventListener("connectionstatechange", () => {
+      log(`connectionStateChange: ${pc.connectionState}`);
+      this.collectAndPostSingleStat(id);
+
       if (pc.connectionState === "closed") {
         this.peerConnections.delete(id);
       }
@@ -83,7 +86,7 @@ class WebrtcInternalExporter {
   }
 
   async collectAndPostSingleStat(id) {
-    const stats = await this.collectStats(id, this.collectAndPostSingleStat);
+    const stats = await this.collectStats(id);
     if (Object.keys(stats).length === 0 || !stats) return;
 
     window.postMessage(
@@ -98,9 +101,10 @@ class WebrtcInternalExporter {
   async collectAllStats() {
     const stats = [];
 
-    for (const [id, pc] of this.peerConnections) {
+    for (const [id] of this.peerConnections) {
       if (this.url && this.enabled) {
-        const pcStats = await this.collectStats(id, pc);
+        const pcStats = await this.collectStats(id);
+        if (Object.keys(pcStats).length === 0 || !pcStats) continue;
         stats.push(pcStats);
       }
     }
@@ -120,16 +124,12 @@ class WebrtcInternalExporter {
 
   /**
    * @param {string} id
-   * @param {RTCPeerConnection} pc
-   * @param {Function} binding
    */
-  async collectStats(id, pc, binding) {
-    var completeStats = {};
+  async collectStats(id) {
+    var pc = this.peerConnections.get(id);
+    if (!pc) return;
 
-    if (!pc) {
-      pc = this.peerConnections.get(id);
-      if (!pc) return;
-    }
+    var completeStats = {};
 
     if (this.url && this.enabled) {
       try {
@@ -157,10 +157,6 @@ class WebrtcInternalExporter {
 
     if (pc.connectionState === "closed") {
       this.peerConnections.delete(id);
-    } else {
-      if (binding) {
-        setTimeout(binding.bind(this), this.updateInterval, id);
-      }
     }
 
     return completeStats;