init

backend/__init__.py

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+import json
+
+from flask import Flask
+from flask_sqlalchemy import SQLAlchemy
+from flask_migrate import Migrate
+
+app = Flask(
+    "__name__",
+)
+db = SQLAlchemy()
+migrate = Migrate(app, db)
+
+with open("backend/config.json") as config_file:
+    config_data = json.load(config_file)
+
+main_settings = config_data["main_settings"]
+app.config.update(main_settings)
+
+db_settings = config_data["db_settings"]
+app.config.update(db_settings)
+
+db.init_app(app)
+
+
+from .main import main as main_blueprint
+
+app.register_blueprint(main_blueprint)

backend/config.json_template

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+{
+    "main_settings": {
+        "SECRET_KEY": "some-very-secret-key",
+        "SQLALCHEMY_TRACK_MODIFICATIONS": false
+    },
+    "db_settings": {
+        "SQLALCHEMY_DATABASE_URI": "postgresql://ownername:pass@localhost/dyxless"
+    }
+}

backend/main.py

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+from flask import Blueprint
+
+main = Blueprint("main", __name__)
+
+
+@main.route("/")
+def index():
+    return "Nice!", 200

backend/requirements.txt

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+alembic==1.8.1
+click==8.1.3
+Flask==2.2.2
+Flask-Migrate==4.0.0
+Flask-SQLAlchemy==3.0.2
+greenlet==2.0.1
+importlib-metadata==5.0.0
+importlib-resources==5.10.0
+itsdangerous==2.1.2
+Jinja2==3.1.2
+Mako==1.2.4
+MarkupSafe==2.1.1
+PyMySQL==1.0.2
+SQLAlchemy==1.4.44
+Werkzeug==2.2.2
+zipp==3.10.0

backend/scripts/runserver.sh

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+#!/bin/bash
+
+set echo off
+
+export FLASK_APP=backend
+export FLASK_DEBUG=true
+
+flask run