Misc cleanup (#73)

* Stop previously running zeroconf instances

* Lots of formatting fixes

* Use f-strings for time delta

* More line fixes

* Update requirements.txt

* More misc cleanup

* Simplify README.md

src/utilities/zeroconf_server.py

@@ -22,6 +22,10 @@ class ZeroconfServer:
         cls.service_type = service_type
         cls.server_name = server_name
         cls.server_port = server_port
+        try:  # Stop any previously running instances
+            socket.gethostbyname(socket.gethostname())
+        except socket.gaierror:
+            cls.stop()
 
     @classmethod
     def start(cls, listen_only=False):
@@ -82,7 +86,7 @@ class ZeroconfServer:
     def found_hostnames(cls):
         fetched_hostnames = [x.split(f'.{cls.service_type}')[0] for x in cls.client_cache.keys()]
         local_hostname = socket.gethostname()
-        # Define a sort key function
+
         def sort_key(hostname):
             # Return 0 if it's the local hostname so it comes first, else return 1
             return False if hostname == local_hostname else True
@@ -98,6 +102,7 @@ class ZeroconfServer:
         decoded_server_info = {key.decode('utf-8'): value.decode('utf-8') for key, value in server_info.items()}
         return decoded_server_info
 
+
 # Example usage:
 if __name__ == "__main__":
     ZeroconfServer.configure("_zordon._tcp.local.", "foobar.local", 8080)