Refactor configuration and update handling:

- Modify .luarc.json to include global Lua scripts.
- Update Makefile to include LDFLAGS for versioning.
- Enhance node.go to implement version checking and update handling.
- Refactor Lua global variables in _globals.lua and echo.lua to use new structures.
- Remove deprecated http.lua and update config.yaml for TLS and update settings.
- Introduce new update.go for version management and update checking.
- Add tests for version comparison in update_test.go.
- Improve error handling in various server methods.

core/update/update_test.go

@@ -0,0 +1,30 @@
+package update
+
+import (
+	"testing"
+)
+
+func TestFunc_isVersionNewer(t *testing.T) {
+	tests := []struct {
+		current string
+		latest  string
+		want    bool
+	}{
+		{"1.0.0", "1.0.0", false},
+		{"1.0.0", "1.0.1", true},
+		{"1.0.1", "1.0.0", false},
+		{"2.0.0", "1.9.9", false},
+		{"2.2.3", "1.9.9", false},
+		{"22.2.3", "1.9.9", false},
+		{"1.2.3", "1.99.9", true},
+		{"1.10", "1.5.99999", false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.current+" vs "+tt.latest, func(t *testing.T) {
+			if got := isVersionNewer(Version(tt.current), Version(tt.latest)); got != tt.want {
+				t.Errorf("isVersionNewer(%q, %q) = %v; want %v", tt.current, tt.latest, got, tt.want)
+			}
+		})
+	}
+}