Somchai Scheduler

### Error 1: Database Connection Timeout * **Root Cause:** The application failed to establish a connection to its PostgreSQL database within the allowed time. The `psycopg` library, which the application uses to talk to the database, gave up after waiting for a response that never came. * **Simple Explanation:** The application tried to call the database, but the database didn't pick up the phone in time. * **Things to Investigate:** * **Network Issues:** Check if there are any network problems (e.g., firewall rules, DNS issues) preventing the application server from reaching the database server. * **Database Health:** Verify that the PostgreSQL database is running, healthy, and not overloaded. An overloaded database may be too slow to accept new connections. * **Configuration:** Double-check that the database hostname, port, and other connection details in the application's configuration are correct. * **Severity:** **CRITICAL**. The application cannot perform its core functions without a database connection.

**Error 1: Database Connection Timeout** * **Root Cause:** The application failed to establish a connection with its PostgreSQL database within the configured time limit. * **Explanation:** The application tried to contact its database to read or write information, but the database did not respond in time. This is like making a phone call and hanging up because no one answered. * **Potential Fixes:** * **Check Database Health:** Verify the PostgreSQL database server is running, healthy, and not overloaded. * **Verify Network Connectivity:** Ensure there are no network issues (e.g., firewall rules, DNS problems) preventing the application container from reaching the database server. * **Verify Configuration:** Double-check that the application's database connection details (hostname, port, credentials) are correct. * **Severity:** **CRITICAL**. An inability to connect to the database will likely render the entire application or its core features non-functional.