Added bcrypt cost

cmd/config.toml

@@ -3,6 +3,9 @@
 secret = "a key"
 # Disable registration
 disabled = false
+# bcrypt cost
+# https://pkg.go.dev/golang.org/x/crypto/bcrypt#pkg-constants
+cost = 10
 
 [server]
 # Listener address

internal/config/config.go

@@ -26,6 +26,7 @@ type Config struct {
 type Auth struct {
 	Secret   string `toml:"secret"`
 	Disabled bool   `toml:"disabled"`
+	Cost     int    `toml:"cost"`
 }
 
 // Server configuration