feat(tests): Add comprehensive tests for Docker image export and streaming functionality

ts/classes.host.ts

@@ -262,12 +262,19 @@ export class DockerHost {
     // Parse the response body based on content type
     let body;
     const contentType = response.headers['content-type'] || '';
-    if (contentType.includes('application/json')) {
+    
+    // Docker's streaming endpoints (like /images/create) return newline-delimited JSON
+    // which can't be parsed as a single JSON object
+    const isStreamingEndpoint = routeArg.includes('/images/create') || 
+                                routeArg.includes('/images/load') ||
+                                routeArg.includes('/build');
+    
+    if (contentType.includes('application/json') && !isStreamingEndpoint) {
       body = await response.json();
     } else {
       body = await response.text();
-      // Try to parse as JSON if it looks like JSON
-      if (body && (body.startsWith('{') || body.startsWith('['))) {
+      // Try to parse as JSON if it looks like JSON and is not a streaming response
+      if (!isStreamingEndpoint && body && (body.startsWith('{') || body.startsWith('['))) {
         try {
           body = JSON.parse(body);
         } catch {
@@ -299,7 +306,8 @@ export class DockerHost {
       .header('Content-Type', 'application/json')
       .header('X-Registry-Auth', this.registryToken)
       .header('Host', 'docker.sock')
-      .options({ keepAlive: false });
+      .timeout(600000) // Set 10 minute timeout for streaming operations
+      .options({ keepAlive: false, autoDrain: false }); // Disable auto-drain for streaming
     
     // If we have a readStream, use the new stream method with logging
     if (readStream) {