Updated local testing in README

examples/dash/dash-connect-pgsql/README.md

@@ -19,6 +19,16 @@ Run `python -m pip install -r requirements.txt` to install all necessary package
 Run `python upload.py` locally to upload the datasets to your PostgreSQL.
 
 ## Local testing
+Add the below lines to your `app.py`
+```python
+from dotenv import load_dotenv
+
+# Load environment variables
+load_dotenv(".env")
+```
+
+You can remove them once you are done with local testing.
+
 Run `python app.py`. You should be able to access the app on your localhost at port 8000.
 
 ## Upload to Ploomber Cloud

examples/dash/dash-connect-pgsql/app.py

@@ -3,10 +3,6 @@
 import pandas as pd
 from sqlalchemy import URL, create_engine
 import os
-from dotenv import load_dotenv # Remove this line once you are done with local teting
-
-# Load environment variables
-load_dotenv(".env") # Remove this line once you are done with local teting
 
 # Connect to PostgreSQL database
 connection_string = URL.create(