Fix imports and add Gunicorn with explicit startup command

Author: seligj95

infra/main.bicep

@@ -62,11 +62,8 @@ resource appService 'Microsoft.Web/sites@2024-04-01' = {
     httpsOnly: true
     siteConfig: {
       linuxFxVersion: 'PYTHON|3.12'
+      appCommandLine: 'gunicorn --bind=0.0.0.0 --timeout 600 --access-logfile \'-\' --error-logfile \'-\' main:app'
       appSettings: [
-        {
-          name: 'WEBSITES_PORT'
-          value: '8000'
-        }
         {
           name: 'SECRET_KEY'
           value: secretKey

requirements.txt

@@ -2,5 +2,6 @@ Flask==3.0.0
 Flask-CORS==4.0.0
 Flask-SQLAlchemy==3.1.1
 SQLAlchemy==2.0.23
+gunicorn==21.2.0
 python-dotenv==1.0.0
 requests==2.31.0

src/app.py

@@ -5,12 +5,9 @@
 from flask import Flask, render_template, request, jsonify
 from flask_cors import CORS
 
-try:
-    from models import db
-    from todo_service import TodoService
-except ImportError:
-    from src.models import db
-    from src.todo_service import TodoService
+# Import from src package explicitly
+from src.models import db
+from src.todo_service import TodoService
 
 
 def create_app():

src/todo_service.py

@@ -4,10 +4,8 @@
 from typing import List, Optional, Dict, Any
 from sqlalchemy.exc import SQLAlchemyError
 
-try:
-    from models import Todo, db
-except ImportError:
-    from src.models import Todo, db
+# Import from src package explicitly
+from src.models import Todo, db
 
 
 class TodoService: