Add python dependencies and websocket echo server

glebby-server/.gitignore

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+venv
+__pycache__

glebby-server/glebby.py

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+from flask import Flask, render_template
+from flask_sock import Sock
+import simple_websocket
+
+app = Flask(__name__)
+sock = Sock(app)
+
+@sock.route('/echo')
+def echo(sock):
+    print('New echo client')
+    try:
+        while True:
+            data = sock.receive()
+            sock.send(data)
+    except simple_websocket.ConnectionClosed:
+        print("Client closed the connection")

glebby-server/requirements.txt

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+click==8.1.3
+Flask==2.2.2
+flask-sock==0.6.0
+h11==0.14.0
+importlib-metadata==6.0.0
+itsdangerous==2.1.2
+Jinja2==3.1.2
+MarkupSafe==2.1.1
+simple-websocket==0.9.0
+Werkzeug==2.2.2
+wsproto==1.2.0
+zipp==3.11.0