feat: create standalone native fnOS repository

app-src/internal/logstore/writer.go

@@ -0,0 +1,22 @@
+package logstore
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+
+	"gopkg.in/natefinch/lumberjack.v2"
+)
+
+func NewAppLogWriter(logsDir string) io.Writer {
+	if err := os.MkdirAll(logsDir, 0o755); err != nil {
+		return os.Stdout
+	}
+	return &lumberjack.Logger{
+		Filename:   filepath.Join(logsDir, "app.log"),
+		MaxSize:    20,
+		MaxBackups: 10,
+		MaxAge:     30,
+		Compress:   true,
+	}
+}