added docker shit

app.py

@@ -9,7 +9,7 @@ from flask import Flask, render_template_string, redirect, url_for
 import sqlite3
 
 app = Flask(__name__)
-DB_FILE = 'counter.db'
+DB_FILE = '/db/counter.db'
 
 def init_db():
     """Initialize the database and set the starting number to 0 if it doesn't exist."""
@@ -98,4 +98,4 @@ if __name__ == '__main__':
     # Initialize the database before starting the server
     init_db()
     # Run the app in debug mode
-    app.run(debug=True)
+    app.run(debug=True)