add webdev sub command

deploy-chatmail/src/deploy_chatmail/www.py

@@ -66,12 +66,12 @@ def _build_webpages(src_dir, build_dir, config):
 
 
 def main():
-    chatmail_domain = "example.testrun.org"
     path = importlib.resources.files(__package__)
     reporoot = path.joinpath("../../../").resolve()
     inipath = reporoot.joinpath("chatmail.ini")
-    config = read_config(inipath, mailname=chatmail_domain)
-    config["webdev"] = True
+    config = read_config(inipath)
+    config.webdev = True
+    assert config.mailname
     www_path = reporoot.joinpath("www")
     src_path = www_path.joinpath("src")
     stats = None