refactor: refactor HTTP request handling and improve linter settings

- Remove the `exportloopref` linter from the golangci configuration
- Add the `strconv` package import in `main.go`
- Replace the `fmt.Sprintf` for the year with `strconv.Itoa` to convert the year to a string
- Update the HTTP request method to use `http.MethodPost` instead of a string literal in `plugin.go`

Signed-off-by: appleboy <appleboy.tw@gmail.com>

.golangci.yaml

@@ -6,7 +6,6 @@ linters:
     - durationcheck
     - errcheck
     - errorlint
-    - exportloopref
     - gci
     - gofmt
     - goimports

main.go

@@ -1,9 +1,9 @@
 package main
 
 import (
-	"fmt"
 	"log"
 	"os"
+	"strconv"
 	"time"
 
 	"github.com/joho/godotenv"
@@ -23,11 +23,10 @@ func main() {
 		_ = godotenv.Overload("/run/drone/env")
 	}
 
-	year := fmt.Sprintf("%v", time.Now().Year())
 	app := cli.NewApp()
 	app.Name = "Drone Discord"
 	app.Usage = "Sending message to Discord channel using Webhook"
-	app.Copyright = "Copyright (c) " + year + " Bo-Yi Wu"
+	app.Copyright = "Copyright (c) " + strconv.Itoa(time.Now().Year()) + " Bo-Yi Wu"
 	app.Authors = []*cli.Author{
 		{
 			Name:  "Bo-Yi Wu",

plugin.go

@@ -163,7 +163,7 @@ func newfileUploadRequest(uri string, params map[string]string, paramName, path
 		return nil, err
 	}
 
-	req, err := http.NewRequest("POST", uri, body)
+	req, err := http.NewRequest(http.MethodPost, uri, body)
 	req.Header.Set("Content-Type", writer.FormDataContentType())
 	return req, err
 }