feat: optional MySQL/MariaDB database driver for deployments that cannot use local SQLite

internal/infrastructure/config/settings.go

@@ -28,6 +28,8 @@ type Settings struct {
 	UploadDir          string
 	JWTSecret          string
 	DBFile             string
+	Database           DatabaseSettings
+	DataDirPath        string
 	Port               string
 	Smtp               SmtpSettings
 	AuthRateLimit      AuthRateLimitSettings
@@ -38,6 +40,9 @@ type Settings struct {
 }
 
 func (s Settings) DataDir() string {
+	if s.DataDirPath != "" {
+		return s.DataDirPath
+	}
 	return filepath.Dir(s.DBFile)
 }
 
@@ -61,6 +66,11 @@ func NewSettingsFromEnv() (Settings, error) {
 		return Settings{}, err
 	}
 
+	database, err := databaseSettingsFromEnv()
+	if err != nil {
+		return Settings{}, err
+	}
+
 	return Settings{
 		Environment:        os.Getenv("ENVIRONMENT"),
 		CorsAllowedOrigins: parseSemicolonSeparatedList(os.Getenv("CORS_ALLOWED_ORIGINS")),
@@ -68,6 +78,8 @@ func NewSettingsFromEnv() (Settings, error) {
 		UploadDir:          os.Getenv("UPLOAD_DIR"),
 		JWTSecret:          os.Getenv("JWT_SECRET"),
 		DBFile:             os.Getenv("DB_FILE"),
+		Database:           database,
+		DataDirPath:        os.Getenv("DATA_DIR"),
 		Port:               os.Getenv("PORT"),
 		Smtp: SmtpSettings{
 			Login:    os.Getenv("SMTP_LOGIN"),