.Net API Service Troubleshooting on Ubuntu Server

I have an API service running on a Ubuntu droplet server, and I'm experiencing issues with the service not starting. The API service interacts with a database, other services and handles file operations.

Key Requirements:
- Diagnose the issue causing the service not to start
- Implement a solution to get the service running again
- Provide recommendations for future prevention

Ideal Skills:
- Proficient in .Net development and troubleshooting
- Experienced with API services
- Familiar with Ubuntu server management
- Knowledgeable in database interaction and service interconnectivity
- Able to handle file operation issues

Please provide your bid along with your relevant experience. Thank you.