diff --git a/README.md b/README.md
index 486e579..01f2237 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 
 ## Requirements
 npm >= 6.0
+in /frontend:
+npm install, um die notwendigen node_modules zu installieren
 
 pip:
 * wheel
@@ -18,11 +20,11 @@ After=network.target
 [Service]
 User=maintenance
 Group=www-data
-WorkingDirectory=/path/to/project
-Environment="PATH=/path/to/project/bin"
+WorkingDirectory=/path/to/project/backend
+Environment="PATH=/path/to/project/venv/backend/bin"
 #remove --reload when site is ready
 #reload restarts workers when code changes
-ExecStart=/path/to/project/bin/gunicorn --reload --workers 3 --bind 0.0.0.0:8900 wsgi:app
+ExecStart=/path/to/project/backend/venv/bin/gunicorn --reload --workers 3 --bind 0.0.0.0:8900 wsgi:app
 
 [Install]
 WantedBy=multi-user.target
diff --git a/backend/project.py b/backend/project.py
index 7cd1e18..63b00df 100644
--- a/backend/project.py
+++ b/backend/project.py
@@ -1,9 +1,11 @@
 from flask import Flask, request, jsonify
 from flask_sqlalchemy import SQLAlchemy
+from flask_cors import CORS
 import time
 
 app = Flask(__name__)
 app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite:///primemeat.db"
+CORS(app)
 
 # DB
 db = SQLAlchemy(app)
diff --git a/frontend/package.json b/frontend/package.json
index 71c30dc..be132df 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -12,7 +12,8 @@
     "react-chartjs-2": "^2.10.0",
     "react-dom": "^17.0.1",
     "react-scripts": "4.0.0",
-    "web-vitals": "^0.2.4"
+    "web-vitals": "^0.2.4",
+    "yarn": "^1.22.10"
   },
   "scripts": {
     "start": "PORT=4000 react-scripts start",
diff --git a/frontend/src/App.js b/frontend/src/App.js
index b7d000b..72052df 100644
--- a/frontend/src/App.js
+++ b/frontend/src/App.js
@@ -32,7 +32,7 @@ function App() {
     const [isLoaded, setIsLoaded] = useState(false);
 
     useEffect(() => {
-        fetch('/api/umsatz')
+        fetch('http://127.0.0.1:8900/api/umsatz')
             .then(response => response.json())
             .then(data => {
                 setIsLoaded(true);
@@ -42,7 +42,7 @@ function App() {
                 setIsLoaded(true);
                 setError(error);
             });
-        fetch('/time')
+        fetch('http://127.0.0.1:8900/time')
             .then(result => result.json())
             .then(data => {
                 setCurrentTime(sec2time(data.time));