debug: attempt to sort oom killing issue by explicitly releasing memory

main.go

@@ -9,6 +9,8 @@ import (
 	"net"
 	"net/http"
 	"os"
+	"runtime"
+	"runtime/debug"
 	"strconv"
 	"time"
 
@@ -329,6 +331,14 @@ func main() {
 		}()
 	}
 
+	go func() {
+		for {
+			time.Sleep(1 * time.Minute)
+			runtime.GC()
+			debug.FreeOSMemory()
+		}
+	}()
+
 	// Listen HTTP
 	listen(router)
 }