Add "Simple Server" example

Signed-off-by: Ercan Ersoy <ercanersoy@ercanersoy.net>

Author: ercanersoy

simple-server/README.md

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+# Simple Server
+
+A simple server program
+
+This example is giving information.

simple-server/simple-server.py

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+import socket
+import sys
+
+with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as server:
+    server.bind(("", 23))
+
+    server.listen(1)
+
+    print("The server has been started.")
+
+    connection, address = server.accept()
+
+    with connection:
+        print("A client has been connected.")
+
+        connection.sendall(b"Hello, World!\n")
+
+        while True:
+            string = connection.recv(1)
+
+            connection.close()
+            print("A connection closed.")
+
+            sys.exit()