diff --git a/.flake8 b/.flake8
new file mode 100644
index 0000000..a60b3be
--- /dev/null
+++ b/.flake8
@@ -0,0 +1,4 @@
+[flake8]
+#ignore = E226,E302,E41
+max-line-length = 130
+max-complexity = 10
diff --git a/.github/workflows/linters.yml b/.github/workflows/linters.yml
index ec345f4..31c33e5 100644
--- a/.github/workflows/linters.yml
+++ b/.github/workflows/linters.yml
@@ -1,14 +1,11 @@
 name: linters
 
-
 on:
-  workflow_run:                # ← event name must be workflow_run
-    workflows: ["Review"]      # ← exact name of your triggering workflow
-    types: [completed]
-    branches: [Development]
-
+  push:
+    branches:
+      - Development
 jobs:
-  on-success:
+  check:
     if: ${{ github.event.workflow_run.conclusion == 'success' }}
     runs-on: ubuntu-latest
     steps:
@@ -30,9 +27,3 @@ jobs:
 
       - name: Run pylint
         run: pylint frontend services utils
-
-  on-failure:
-    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
-    runs-on: ubuntu-latest
-    steps:
-      - run: echo 'The Review workflow failed'
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 423b63b..9d7ccd1 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -1,13 +1,12 @@
 name: Unit Test
 
 on:
-  workflow_run:
-    workflows: ["linters"]
-    types: [completed] #requested
-
+  push:
+    branches:
+      - main
 
 jobs:
-  on-success:
+  Unit-Test:
     runs-on: ubuntu-latest
     steps:
 
@@ -29,10 +28,4 @@ jobs:
 
       # 6. Run unit tests
       - name: Run pytest
-        run: pytest
-
-  on-failure:
-    runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'failure' }}
-    steps:
-      - run: echo 'The triggering workflow failed'
\ No newline at end of file
+        run: pytest
\ No newline at end of file
diff --git a/config/__pycache__/database.cpython-312.pyc b/config/__pycache__/database.cpython-312.pyc
new file mode 100644
index 0000000..71bd015
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diff --git a/config/database.py b/config/database.py
index 2f39957..7b6dc6e 100644
--- a/config/database.py
+++ b/config/database.py
@@ -1,4 +1,5 @@
 import os
+from pathlib import Path
 from typing import Any, Dict
 
 
@@ -10,7 +11,15 @@ class DatabaseConfig:
 
     def _load_config(self) -> Dict[str, Any]:
         if self.db_type.lower() == "sqlite":
-            return {"path": os.getenv("SQLITE_PATH", "databases/chatbot.db")}
+            # Standardpfad relativ zum Projektroot
+            default_path = Path(__file__).parent.parent / "databases" / "chatbot.db"
+            sqlite_path = os.getenv("SQLITE_PATH", str(default_path))
+
+            # Stelle sicher, dass wir einen absoluten Pfad haben
+            if not Path(sqlite_path).is_absolute():
+                sqlite_path = Path.cwd() / sqlite_path
+
+            return {"path": str(sqlite_path)}
         elif self.db_type.lower() == "mysql":
             return {
                 "host": os.getenv("MYSQL_HOST", "localhost"),
diff --git a/database/__pycache__/__init__.cpython-312.pyc b/database/__pycache__/__init__.cpython-312.pyc
new file mode 100644
index 0000000..5989d4a
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diff --git a/database/__pycache__/flask_integration.cpython-312.pyc b/database/__pycache__/flask_integration.cpython-312.pyc
new file mode 100644
index 0000000..9d821a4
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diff --git a/database/__pycache__/interface.cpython-312.pyc b/database/__pycache__/interface.cpython-312.pyc
new file mode 100644
index 0000000..c3b58ab
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diff --git a/database/__pycache__/sqlite_db.cpython-312.pyc b/database/__pycache__/sqlite_db.cpython-312.pyc
new file mode 100644
index 0000000..0133928
Binary files /dev/null and b/database/__pycache__/sqlite_db.cpython-312.pyc differ
diff --git a/database/flask_integration.py b/database/flask_integration.py
index 1300051..883becd 100644
--- a/database/flask_integration.py
+++ b/database/flask_integration.py
@@ -1,6 +1,6 @@
 import logging
 
-from flask import current_app, g
+from flask import g
 
 from .interface import DatabaseInterface
 
diff --git a/database/interface.py b/database/interface.py
index 0c05695..841bf1c 100644
--- a/database/interface.py
+++ b/database/interface.py
@@ -1,5 +1,5 @@
 from abc import ABC, abstractmethod
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict, Optional
 
 
 class DatabaseInterface(ABC):
diff --git a/database/sqlite_db.py b/database/sqlite_db.py
index 1e5074a..0d9ef02 100644
--- a/database/sqlite_db.py
+++ b/database/sqlite_db.py
@@ -1,5 +1,6 @@
 import logging
 import sqlite3
+from pathlib import Path
 from threading import local
 from typing import Any, Dict, Optional
 
@@ -13,32 +14,50 @@ class SQLiteDatabase(DatabaseInterface):
 
     def __init__(self, db_path: str):
         self.db_path = db_path
+        # Erstelle Verzeichnis falls nicht vorhanden
+        self._ensure_database_directory()
         # Thread-local storage für Verbindungen
         self._local = local()
 
+    def _ensure_database_directory(self) -> None:
+        """Stellt sicher, dass das Database-Verzeichnis existiert"""
+        db_dir = Path(self.db_path).parent
+        if not db_dir.exists():
+            try:
+                db_dir.mkdir(parents=True, exist_ok=True)
+                logger.info(f"Created database directory: {db_dir}")
+            except OSError as e:
+                logger.error(f"Failed to create database directory {db_dir}: {e}")
+                raise
+
     def _get_connection(self) -> sqlite3.Connection:
         """Holt oder erstellt eine thread-lokale Verbindung"""
         if not hasattr(self._local, "connection") or self._local.connection is None:
-            self._local.connection = sqlite3.connect(
-                self.db_path,
-                check_same_thread=False,  # Erlaubt thread-übergreifende Nutzung
-                timeout=30.0,
-                detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES,
-            )
-            self._local.connection.row_factory = sqlite3.Row
-            # Optimierungen für bessere Performance
-            self._local.connection.execute("PRAGMA journal_mode=WAL")
-            self._local.connection.execute("PRAGMA synchronous=NORMAL")
-            self._local.connection.execute("PRAGMA cache_size=1000")
-            self._local.connection.execute("PRAGMA temp_store=MEMORY")
-            logger.debug(f"New SQLite connection created for thread")
-
+            try:
+                # Absoluten Pfad verwenden für bessere Kompatibilität
+                abs_path = Path(self.db_path).resolve()
+                self._local.connection = sqlite3.connect(
+                    str(abs_path),
+                    check_same_thread=False,  # Erlaubt thread-übergreifende Nutzung
+                    timeout=30.0,
+                    detect_types=sqlite3.PARSE_DECLTYPES | sqlite3.PARSE_COLNAMES,
+                )
+                self._local.connection.row_factory = sqlite3.Row
+                # Optimierungen für bessere Performance
+                self._local.connection.execute("PRAGMA journal_mode=WAL")
+                self._local.connection.execute("PRAGMA synchronous=NORMAL")
+                self._local.connection.execute("PRAGMA cache_size=1000")
+                self._local.connection.execute("PRAGMA temp_store=MEMORY")
+                logger.debug(f"New SQLite connection created for thread: {abs_path}")
+            except sqlite3.Error as e:
+                logger.error(f"Failed to connect to SQLite database at {abs_path}: {e}")
+                raise
         return self._local.connection
 
     def connect(self) -> None:
         """Initialisiert die thread-lokale Verbindung"""
         try:
-            conn = self._get_connection()
+            self._get_connection()  # Entfernt das unbenutzte 'conn'
             logger.info(f"Connected to SQLite database: {self.db_path}")
         except Exception as e:
             logger.error(f"Failed to connect to SQLite database: {e}")
@@ -61,14 +80,14 @@ class SQLiteDatabase(DatabaseInterface):
         try:
             cursor.execute(
                 """
-                           CREATE TABLE IF NOT EXISTS users
-                           (
-                               id INTEGER PRIMARY KEY AUTOINCREMENT,
-                               username TEXT NOT NULL UNIQUE,
-                               email TEXT NOT NULL UNIQUE,
-                               password_hash TEXT NOT NULL,
-                               created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ) 
-                           """
+                    CREATE TABLE IF NOT EXISTS users
+                        (
+                            id INTEGER PRIMARY KEY AUTOINCREMENT,
+                            username TEXT NOT NULL UNIQUE,
+                            email TEXT NOT NULL UNIQUE,
+                            password_hash TEXT NOT NULL,
+                            created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP )
+                """
             )
             conn.commit()
             logger.info("User table created/verified")
diff --git a/frontend/__pycache__/app.cpython-312.pyc b/frontend/__pycache__/app.cpython-312.pyc
new file mode 100644
index 0000000..c2a6ba3
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diff --git a/main.py b/main.py
index 49e1f9f..0c9fee6 100644
--- a/main.py
+++ b/main.py
@@ -1,8 +1,12 @@
 import logging
 import os
 
+from dotenv import load_dotenv
+
 from frontend.app import app
 
+load_dotenv()
+
 # Logging konfigurieren
 logging.basicConfig(
     level=logging.INFO, format="%(asctime)s - %(name)s - %(levelname)s - %(message)s"
@@ -15,6 +19,7 @@ if __name__ == "__main__":
     debug = os.getenv("FLASK_DEBUG", "False").lower() == "true"
     host = os.getenv("FLASK_HOST", "0.0.0.0")
     port = int(os.getenv("FLASK_PORT", "8080"))
+    print(port)
 
     logger.info(f"Starting ChatBot application on {host}:{port}")
     logger.info(f"Debug mode: {debug}")
diff --git a/requirements.txt b/requirements.txt
index 2bc2985..1b37a24 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,36 +1,28 @@
-# Requirements for PY_ChatBot
-# Core Framework
-Flask>=2.3.0,<3.0.0
-Werkzeug>=2.3.0,<3.0.0
-
-# Database & ORM (Optional for future expansion)
-SQLAlchemy>=2.0.0,<3.0.0
-
-# Environment & Configuration
-python-dotenv>=1.0.0
-
-# Security & Authentication
-bcrypt>=4.0.0
-
-# HTTP Client (for health checks and external APIs)
-requests>=2.31.0
-
-# Date/Time utilities
-python-dateutil>=2.8.0
-
-# Development Dependencies (commented out for production)
-# pytest>=7.4.0
-# pytest-flask>=1.2.0
-# pytest-cov>=4.1.0
-# black>=23.7.0
-# flake8>=6.0.0
-# mypy>=1.5.0
-
-# Production WSGI Server
-gunicorn>=21.2.0
-
-# Logging
-colorlog>=6.7.0
-
-# Utility
-click>=8.1.0
\ No newline at end of file
+astroid==3.3.11
+black==25.9.0
+blinker==1.9.0
+click==8.3.0
+dill==0.4.0
+dotenv==0.9.9
+flake8==7.3.0
+Flask==3.1.2
+iniconfig==2.1.0
+isort==6.1.0
+itsdangerous==2.2.0
+Jinja2==3.1.6
+MarkupSafe==3.0.3
+mccabe==0.7.0
+mypy_extensions==1.1.0
+packaging==25.0
+pathspec==0.12.1
+platformdirs==4.4.0
+pluggy==1.6.0
+pycodestyle==2.14.0
+pyflakes==3.4.0
+Pygments==2.19.2
+pylint==3.3.8
+pytest==8.4.2
+python-dotenv==1.1.1
+pytokens==0.1.10
+tomlkit==0.13.3
+Werkzeug==3.1.3
diff --git a/services/__pycache__/__init__.cpython-312.pyc b/services/__pycache__/__init__.cpython-312.pyc
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index 0000000..d7639ef
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diff --git a/services/__pycache__/auth_service.cpython-312.pyc b/services/__pycache__/auth_service.cpython-312.pyc
new file mode 100644
index 0000000..cc9e2e4
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diff --git a/services/__pycache__/user_service.cpython-312.pyc b/services/__pycache__/user_service.cpython-312.pyc
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index 0000000..68d0cf0
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diff --git a/services/user_service.py b/services/user_service.py
index 83fa5b7..2cf6634 100644
--- a/services/user_service.py
+++ b/services/user_service.py
@@ -15,36 +15,41 @@ class UserService:
     def create_user(
         self, username: str, email: str, password: str
     ) -> tuple[bool, list[str]]:
-        errors = []
+        errors = self._validate_user_inputs(username, email, password)
+        if errors:
+            return False, errors
 
-        # Validierung
+        errors = self._check_user_existence(username, email)
+        if errors:
+            return False, errors
+
+        password_hash = PasswordUtils.hash_password_simple(password)
+        return self._attempt_user_creation(username, email, password_hash)
+
+    def _validate_user_inputs(
+        self, username: str, email: str, password: str
+    ) -> list[str]:
+        errors = []
         if not ValidationUtils.validate_username(username):
             errors.append("Invalid username format")
-
         if not ValidationUtils.validate_email(email):
             errors.append("Invalid email format")
-
         password_valid, password_errors = ValidationUtils.validate_password(password)
         if not password_valid:
             errors.extend(password_errors)
+        return errors
 
-        if errors:
-            return False, errors
-
-        # Prüfe auf existierende User
+    def _check_user_existence(self, username: str, email: str) -> list[str]:
+        errors = []
         if self.get_user_by_email(email):
             errors.append("Email already registered")
-
         if self.get_user_by_username(username):
             errors.append("Username already taken")
+        return errors
 
-        if errors:
-            return False, errors
-
-        # Passwort hashen
-        password_hash = PasswordUtils.hash_password_simple(password)
-
-        # User erstellen
+    def _attempt_user_creation(
+        self, username: str, email: str, password_hash: str
+    ) -> tuple[bool, list[str]]:
         try:
             success = self.db.create_user(username, email.lower(), password_hash)
             if success:
diff --git a/test.txt b/test.txt
new file mode 100644
index 0000000..e69de29
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