[golangci-lint]: Check for errors on file.Close().

main.go

@@ -63,7 +63,10 @@ func readMessage(messageFilePath string) (string, error) {
 		}
 	}
 
-	file.Close()
+	err = file.Close()
+	if err != nil {
+		fmt.Println("error while closing file:", err)
+	}
 
 	return output, err
 }

ox.go

@@ -7,6 +7,7 @@ package main
 import (
 	"encoding/base64"
 	"errors"
+	"fmt"
 	"log"
 	"os"
 	"runtime"
@@ -428,7 +429,6 @@ func oxStoreKey(location string, key string) error {
 	if err != nil {
 		return err
 	}
-	defer file.Close()
 	if runtime.GOOS != "windows" {
 		_ = file.Chmod(os.FileMode(0600))
 	} else {
@@ -438,6 +438,10 @@ func oxStoreKey(location string, key string) error {
 	if err != nil {
 		return err
 	}
+	err = file.Close()
+	if err != nil {
+		fmt.Println("error while closing file:", err)
+	}
 	return nil
 }