remove errcheck linter

.golangci.yml

···
+linters:
+  disable:
+    - errcheck

cmd/fetch.go

···
 			wk := worker.NewWorker(a, k.String("dir"), k.String("domain"))
 			_ = wk.Start()
 
-			//nolint:errcheck
 			defer wk.Stop()
 
 			w := httptest.NewRecorder()

cmd/up.go

···
 				return fmt.Errorf("failed to create watcher: %v", err)
 			}
 
-			//nolint:errcheck
 			go watcher.Start()
 			defer watcher.Stop()
 
···
 				}
 
 				fmt.Fprintf(os.Stderr, "Serving *.%s from %s with on-demand TLS...\n", k.String("domain"), utils.AddTilde(k.String("dir")))
-				//nolint:errcheck
 				go certmagic.HTTPS(nil, handler)
 			} else {
 				addr := flags.addr
···
 				}
 
 				fmt.Fprintf(os.Stderr, "Serving *.%s from %s on %s...\n", k.String("domain"), utils.AddTilde(k.String("dir")), addr)
-				//nolint:errcheck
 				go http.Serve(listener, handler)
 			}
 
···
 							}
 
 							go func() {
-								//nolint:errcheck
 								io.Copy(stdin, sess)
 							}()
 
···
 							if err := cmd.Run(); err != nil {
 								var exitErr *exec.ExitError
 								if errors.As(err, &exitErr) {
-									//nolint:errcheck
 									sess.Exit(exitErr.ExitCode())
 									return
 								}
 
 								fmt.Fprintf(sess, "failed to run command: %v", err)
-								//nolint:errcheck
 								sess.Exit(1)
 								return
 							}
···
 					}
 				}
 
-				//nolint:errcheck
 				server.SetOption(ssh.HostKeyFile(hostKeyPath))
 
 				listener, err := getListener(flags.sshAddr, "", "")
···
 				}
 
 				fmt.Fprintf(os.Stderr, "Starting SSH server on %s...\n", flags.sshAddr)
-				//nolint:errcheck
 				go server.Serve(listener)
 				defer server.Close()
 			}
···
 func (me *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	appname, redirect, ok := lookupApp(r.Host, k.String("domain"), k.StringMap("customDomains"))
 	if !ok {
-		//nolint:errcheck
 		w.Write([]byte(fmt.Sprintf("No app found for host %s", r.Host)))
 		w.WriteHeader(http.StatusNotFound)
 		return
···
 	wk, err := me.GetWorker(appname, k.String("dir"), k.String("domain"))
 	if err != nil {
 		if errors.Is(err, app.ErrAppNotFound) {
-			//nolint:errcheck
 			w.Write([]byte(fmt.Sprintf("No app found for host %s", r.Host)))
 			w.WriteHeader(http.StatusNotFound)
 			return