fix: address /home/stevan/go/bin/golangci-lint run ./... issues

internal/auth/auth.go

@@ -96,6 +96,8 @@ func GetAPIKey(headers http.Header) (string, error) {
 // token.
 func MakeRefreshToken() string {
 	bytes := make([]byte, 32)
-	rand.Read(bytes)
+	if _, err := rand.Read(bytes); err != nil {
+		panic(err)
+	}
 	return hex.EncodeToString(bytes)
 }

internal/auth/auth_test.go

@@ -13,9 +13,16 @@ func TestJwtCreationAndValidation(t *testing.T) {
 	secret := []byte("RTCK2UTcOUkiswdrClC6Z3KmmEq/+QicpD9iRx7J0qY=")
 
 	jwtString, err := auth.MakeJWT(userId, secret, time.Hour)
+	if err != nil {
+		t.Fatalf("failed to create JWT: %v", err)
+	}
+
 	validatedUserId, err := auth.ValidateJWT(jwtString, secret)
+	if err != nil {
+		t.Fatalf("failed to validate JWT: %v", err)
+	}
 
 	if userId != validatedUserId {
-		t.Fatalf("received %s expected %s: %v", validatedUserId, userId, err)
+		t.Fatalf("received %s expected %s", validatedUserId, userId)
 	}
 }

internal/server/handlers_admin.go

@@ -23,14 +23,14 @@ func (s *Server) HandleIndex(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Add("Content-Type", "text/html; charset=utf-8")
 	w.WriteHeader(http.StatusOK)
-	w.Write(s.indexHTML)
+	_, _ = w.Write(s.indexHTML)
 }
 
 // HandleHealthChecks reports that the service is up.
 func (s *Server) HandleHealthChecks(w http.ResponseWriter, r *http.Request) {
 	w.Header().Add("Content-Type", "text/plain; charset=utf-8")
 	w.WriteHeader(http.StatusOK)
-	w.Write([]byte("OK"))
+	_, _ = w.Write([]byte("OK"))
 }
 
 // HandleReset clears the file server hit counter and deletes all users. It is
@@ -50,7 +50,7 @@ func (s *Server) HandleReset(w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Add("Content-Type", "text/plain; charset=utf-8")
 	w.WriteHeader(http.StatusOK)
-	w.Write([]byte("OK"))
+	_, _ = w.Write([]byte("OK"))
 }
 
 // HandleMetrics renders the admin page showing how many times the file server