Enhancement: Configurable Environment Settings in utils.sh

[Vaibhav701161]

fixes: #46

Description:

This PR introduces configurable environment settings in utils.sh by leveraging .env.defaults.example to provide a structured and adaptable configuration approach.

Key Changes:

• Introduced .env.defaults.example to serve as a reference configuration file
• Ensured utils.sh dynamically loads environment variables from .env.defaults and .env
• Improved error handling for missing or malformed environment variables

Why This Change?

Previously, environment variables were hardcoded, leading to inconsistencies when deploying across different environments. With this update, developers can:
✅ Customize environment settings easily
✅ Avoid accidental overwrites of critical variables
✅ Ensure better maintainability and clarity

---

Testing Performed:

1️⃣ Syntax Validation

bash -n utils.sh

✅ No syntax errors detected

2️⃣ Executable Permission Check

chmod +x utils.sh
ls -l utils.sh

✅ Verified the script has execution permissions

3️⃣ Running the Script

./utils.sh

✅ Expected Output:

[INFO] Loading configuration from .env.defaults
[INFO] Loading configuration overrides from .env

Confirmed successful loading of configuration files

4️⃣ Data Fetching Verification

wget https://cbioportal-datahub.s3.amazonaws.com/lgg_ucsf_2014.tar.gz -O test.tar.gz

✅ Successfully downloaded test data, verifying the script runs as expected