Updated app.py, Added requirements.txt, and Created a Dockerfile

Dockerfile

@@ -0,0 +1,12 @@
+
+FROM python:3.8.2
+
+WORKDIR /app
+
+COPY . /app
+
+RUN pip install -r requirements.txt
+
+EXPOSE 5000
+
+CMD ["python","app.py"]

app.py

@@ -3,48 +3,46 @@
 
 app = Flask(__name__)
 
-# /// = relative path, //// = absolute path
 app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///db.sqlite'
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 db = SQLAlchemy(app)
 
-
 class Todo(db.Model):
     id = db.Column(db.Integer, primary_key=True)
-    title = db.Column(db.String(100))
-    complete = db.Column(db.Boolean)
+    title = db.Column(db.String(100), nullable=False)
+    complete = db.Column(db.Boolean, default=False)
 
+with app.app_context():
+    db.create_all()
 
 @app.route("/")
 def home():
     todo_list = Todo.query.all()
     return render_template("base.html", todo_list=todo_list)
 
-
 @app.route("/add", methods=["POST"])
 def add():
     title = request.form.get("title")
-    new_todo = Todo(title=title, complete=False)
-    db.session.add(new_todo)
-    db.session.commit()
+    if title:
+        new_todo = Todo(title=title, complete=False)
+        db.session.add(new_todo)
+        db.session.commit()
     return redirect(url_for("home"))
 
-
-@app.route("/update/<int:todo_id>")
+@app.route("/update/<int:todo_id>", methods=["POST"])
 def update(todo_id):
-    todo = Todo.query.filter_by(id=todo_id).first()
+    todo = Todo.query.get_or_404(todo_id)
     todo.complete = not todo.complete
     db.session.commit()
     return redirect(url_for("home"))
 
-
-@app.route("/delete/<int:todo_id>")
+@app.route("/delete/<int:todo_id>", methods=["POST"])
 def delete(todo_id):
-    todo = Todo.query.filter_by(id=todo_id).first()
+    todo = Todo.query.get_or_404(todo_id)
     db.session.delete(todo)
     db.session.commit()
     return redirect(url_for("home"))
 
 if __name__ == "__main__":
-    db.create_all()
-    app.run(debug=True)
+    app.run(host="0.0.0.0", port=5000, debug=True)
+

requirements.txt

@@ -0,0 +1,6 @@
+
+#This Is Create For install Required Libraries Efficiently
+
+Flask
+
+Flask-SQLAlchemy