Deployment communication.

src/snek/system/docker.py

@@ -156,7 +156,14 @@ class ComposeFileManager:
         )
         if name in self.running_instances:
             del self.running_instances[name]
-        stdout, stderr = await proc.communicate()
+        stdout, stderr = None, None
+        while proc.returncode is None:
+            try:
+                stdout, stderr = await proc.communicate()
+            except Exception as ex:
+                stdout = b''
+                stderr = str(ex).encode()
+            await self.event_handler(name,"stdout",stdout or stderr)
         if proc.returncode != 0:
             raise RuntimeError(f"Failed to stop {name}: {stderr.decode()}")
         if stdout: