Retry web admin port bind instead of crashing on the first race

Live-confirmed: OSError: [Errno 98] Address already in use on the
web admin's TCPServer bind, right after a container recreate under
network_mode: host. Unlike bridge-mode port publishing, there's no
Docker-managed mapping to instantly free on teardown — the previous
container's own web admin process has to actually die first, and a
fast recreate-right-after-recreate can race that. The process crashed
immediately instead of retrying, so the web admin silently never came
up despite entrypoint.sh correctly launching it.

Retry the bind up to 10 times with a 2s backoff before giving up.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015X1jRGHwrvovz2qkhKfDZi

vendor/easy-asterisk/easy-asterisk-v0.10.0.sh

@@ -4116,6 +4116,7 @@ import json
 import subprocess
 import os
 import re
+import time
 import base64
 import hashlib
 import html
@@ -6134,7 +6135,25 @@ class WebAdminHandler(http.server.BaseHTTPRequestHandler):
         self.wfile.write(json.dumps(data).encode())
 
 def main():
-    with socketserver.TCPServer(("", PORT), WebAdminHandler) as httpd:
+    # A container recreate under network_mode: host depends on the *previous*
+    # container's web admin process actually dying before the port is free —
+    # there's no Docker-managed port mapping to instantly release it like
+    # there would be in bridge mode. A fast recreate-right-after-recreate can
+    # briefly race that teardown. Retry instead of crashing on the first
+    # failure, which otherwise means the web admin silently never comes up.
+    httpd = None
+    last_err = None
+    for attempt in range(10):
+        try:
+            httpd = socketserver.TCPServer(("", PORT), WebAdminHandler)
+            break
+        except OSError as e:
+            last_err = e
+            print(f"Port {PORT} not free yet ({e}), retrying...")
+            time.sleep(2)
+    if httpd is None:
+        raise last_err
+    with httpd:
         print(f"Easy Asterisk Web Admin running on port {PORT}")
         httpd.serve_forever()