Fix linter findings for: goerr113

.golangci.yaml

@@ -19,11 +19,10 @@ linters:
     - noctx
     - funlen
     - nestif
+    - gocognit
     - interfacer
     - revive
     - cyclop
-    - goerr113
-    - gocognit
 
     # deprecated:
     - scopelint

internal/types/errors.go

@@ -6,4 +6,7 @@ var (
 	ErrNotFound          = errors.New("cache entry not found")
 	ErrInvalidCacheEntry = errors.New("invalid cache entry format")
 	ErrUpstream          = errors.New("upstream error")
+
+	// ErrNoServersConfigured means that there are no servers to run.
+	ErrNoServersConfigured = errors.New("no servers configured")
 )

srv.go

@@ -2,7 +2,6 @@ package main
 
 import (
 	"crypto/tls"
-	"errors"
 	"fmt"
 	"io"
 	"log"
@@ -16,6 +15,7 @@ import (
 	geoloc "github.com/chubin/wttr.in/internal/geo/location"
 	"github.com/chubin/wttr.in/internal/logging"
 	"github.com/chubin/wttr.in/internal/processor"
+	"github.com/chubin/wttr.in/internal/types"
 )
 
 //nolint:gochecknoglobals
@@ -158,7 +158,7 @@ func serve(conf *config.Config) error {
 		numberOfServers++
 	}
 	if numberOfServers == 0 {
-		return errors.New("no servers configured")
+		return types.ErrNoServersConfigured
 	}
 
 	return <-errs // block until one of the servers writes an error