feat: replace config file with an example and let gsw_service start without a config file

[K3das]

gsw_service.yaml is currently tracked in git, despite being deployment-specific. This change creates an example configuration file and adds the real config file to gitignore. This also makes it possible to start gsw_service with no config file at all, if necessary environment variables are provided.

[Copilot]

Pull request overview

This PR refactors configuration management to follow best practices by removing deployment-specific configuration from version control. The changes enable the gsw_service to start without a config file when required environment variables are provided.

• Creates an example configuration file with helpful comments
• Adds the actual config file to .gitignore to prevent deployment-specific settings from being tracked
• Implements graceful fallback to environment variables when config file is not found

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
data/config/gsw_service.yaml.example	Reorganized example config with added explanatory comments for each section
compose.yaml	Added GSW_TELEMETRY_CONFIG environment variable for Docker Compose deployments
cmd/gsw_service.go	Modified config reading logic to allow missing config file and fall back to environment variables
cmd/Containerfile	Added default environment variables for database connection and logging configuration
README.md	Added Configuration section documenting how to set up config file and use environment variables
.gitignore	Added gsw_service.yaml to prevent tracking deployment-specific configuration

Comments suppressed due to low confidence (1)

cmd/gsw_service.go:137

• The telemetry_config validation should be added to readConfig() alongside the database_host_name and database_port_number checks for consistency. Currently, telemetry_config is validated later in telemetryConfigInitialize(), which means the service could proceed past readConfig() with an incomplete configuration. Consider adding: if !config.IsSet("telemetry_config") { logger.Panic("Error reading GSW config: telemetry_config not set...") }

	if !config.IsSet("database_host_name") {
		logger.Panic("Error reading GSW config: database_host_name not set...")
	}
	if !config.IsSet("database_port_number") {
		logger.Panic("Error reading GSW config: database_port_number not set...")
	}

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[AarC10]

TY!