updated dependency, installed python dotenv

Signed-off-by: Harshjosh361 <harshjosh361@gmail.com>

Author: Harshjosh361

flask_postgresql_app/app.py

@@ -1,9 +1,15 @@
 from flask import Flask, jsonify, request
 from flask_sqlalchemy import SQLAlchemy
+from dotenv import load_dotenv
+import os
+
+# Load environment variables from .env file
+load_dotenv()
 
 app = Flask(__name__)
-app.config['SQLALCHEMY_DATABASE_URI'] = 'postgresql://flaskuser:password@db:5432/flaskdb'
+app.config['SQLALCHEMY_DATABASE_URI'] = os.getenv('DATABASE_URL')
 app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+
 db = SQLAlchemy(app)
 
 class User(db.Model):
@@ -15,7 +21,7 @@ def __init__(self, name):
         self.name = name
 
 # Create the database tables
-@app.before_first_request
+@app.before_request
 def create_tables():
     db.create_all()
 
@@ -41,7 +47,6 @@ def add_user():
     db.session.commit()
     return jsonify({"message": f"User {name} added.", "id": user.id}), 201
 
-
 # PUT to update a user
 @app.route('/users/<int:id>', methods=['PUT'])
 def update_user(id):

flask_postgresql_app/docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   web:
     build: .

flask_postgresql_app/requirements.txt

@@ -1,5 +1,6 @@
-Flask==2.0.1
-Flask-SQLAlchemy==2.5.1
-psycopg2-binary==2.9.1
-Werkzeug==2.0.1
-SQLAlchemy==1.3.24
+Flask==2.3.3
+Flask-SQLAlchemy==3.0.5
+psycopg2-binary==2.9.10
+Werkzeug==3.0.5
+SQLAlchemy==2.0.36
+python-dotenv