diff --git a/README.md b/README.md
index fcc0790..9ff9134 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,47 @@
 # acht-damen-tuerme-problem
 IDPA Arbeit im23a Kristian Anastasia und Jérôme
+
+```
+project-root/
+│
+├── app/
+│   ├── __init__.py          # Flask App Factory
+│   ├── config.py            # Konfiguration (DB, Secrets, etc.)
+│   │
+│   ├── models/              # Datenbankmodelle
+│   │   ├── __init__.py
+│   │   ├── user.py
+│   │   ├── tenant.py
+│   │   ├── membership.py
+│   │   └── solver_job.py
+│   │
+│   ├── routes/              # API/Endpoints
+│   │   ├── __init__.py
+│   │   ├── auth_routes.py
+│   │   ├── tenant_routes.py
+│   │   ├── solver_routes.py
+│   │   └── job_routes.py
+│   │
+│   ├── services/            # Businesslogik (Solver etc.)
+│   │   ├── __init__.py
+│   │   ├── solver_service.py
+│   │   └── auth_service.py
+│   │
+│   ├── templates/           # HTML (Jinja Templates)
+│   │   ├── base.html
+│   │   ├── login.html
+│   │   ├── dashboard.html
+│   │   └── solver.html
+│   │
+│   ├── static/              # CSS, JS, Bilder
+│       ├── css/
+│       ├── js/
+│       └── img/
+│
+├── tests/                   # optionale Tests
+│
+├── run.py                   # Startpunkt der Anwendung
+├── requirements.txt
+├── .env                     # DB-Zugangsdaten, Secrets
+└── README.md
+```
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diff --git a/app/__init__.py b/app/__init__.py
new file mode 100644
index 0000000..6c3fb29
--- /dev/null
+++ b/app/__init__.py
@@ -0,0 +1,18 @@
+from flask import Flask
+
+def create_app():
+    app = Flask(__name__)
+
+    # Basic config
+    app.config["SECRET_KEY"] = "dev-secret-key"
+
+    # # ---- Register Blueprints (Routes) ----
+    # from .routes.auth_routes import auth_bp
+    # from .routes.solver_routes import solver_bp
+    from .routes.main_routes import main_bp
+
+    # app.register_blueprint(auth_bp)
+    # app.register_blueprint(solver_bp)
+    app.register_blueprint(main_bp)
+
+    return app
diff --git a/app/routes/main_routes.py b/app/routes/main_routes.py
new file mode 100644
index 0000000..c67ef5d
--- /dev/null
+++ b/app/routes/main_routes.py
@@ -0,0 +1,7 @@
+from flask import Blueprint, render_template
+
+main_bp = Blueprint("main", __name__)
+
+@main_bp.route("/")
+def home():
+    return render_template("index.html")
diff --git a/app/templates/index.html b/app/templates/index.html
new file mode 100644
index 0000000..cab8a34
--- /dev/null
+++ b/app/templates/index.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>{% block title %}Solver App{% endblock %}</title>
+
+    <!-- CSS -->
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
+
+    {% block head_extra %}{% endblock %}
+</head>
+
+<body>
+
+    <!-- Navigation -->
+    <header class="navbar">
+        <div class="container">
+            <h1 class="logo">SolverApp</h1>
+
+            <nav>
+                <a href="/">Home</a>
+                <a href="/solver">Solver</a>
+
+                {% if session.get('user_id') %}
+                <a href="/dashboard">Dashboard</a>
+                <a href="/logout">Logout</a>
+                {% else %}
+                <a href="/login">Login</a>
+                {% endif %}
+            </nav>
+        </div>
+    </header>
+
+    <!-- Flash messages -->
+    <main class="container">
+        {% with messages = get_flashed_messages(with_categories=true) %}
+        {% if messages %}
+        <div class="flash-container">
+            {% for category, message in messages %}
+            <div class="flash {{ category }}">
+                {{ message }}
+            </div>
+            {% endfor %}
+        </div>
+        {% endif %}
+        {% endwith %}
+
+        <!-- Page Content -->
+        {% block content %}{% endblock %}
+    </main>
+
+    <!-- Footer -->
+    <footer class="footer">
+        <div class="container">
+            <p>© {{ 2026 }} SolverApp</p>
+        </div>
+    </footer>
+
+    <!-- JS -->
+    <script src="{{ url_for('static', filename='js/main.js') }}"></script>
+    {% block scripts %}{% endblock %}
+</body>
+
+</html>
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diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..4732092
Binary files /dev/null and b/requirements.txt differ
diff --git a/run.py b/run.py
new file mode 100644
index 0000000..5b0a89d
--- /dev/null
+++ b/run.py
@@ -0,0 +1,6 @@
+from app import create_app
+
+app = create_app()
+
+if __name__ == "__main__":
+    app.run(debug=True)
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