Fix log stream cleanup for containers with tty.

When services started with "tty: true" exited early, dcmon was exiting
with the following node error:
    Error [ERR_STREAM_WRITE_AFTER_END]: write after end

The default pipe stream behavior is to close the stream on error but we
were writing to it after that. So change the behavior so that the
behavior to not end the destination when the source ends.

src/dcmon/core.cljc

@@ -447,6 +447,7 @@ Options:
       (event :container-running {:service service :cidx cidx :id (.-id container)
                                  :recreate-stream? (if old-stream true false)}))
     (when old-stream
+      ;; Clean up old stream
       (.destroy old-stream)
       (swap! ctx update-in [:services service cidx] merge {:log-stream nil
                                                            :log-lines 0})
@@ -456,10 +457,11 @@ Options:
                                          :stderr true
                                          :timestamps true})]
       (if tty
-        (.pipe stream log-stream)
+        (.pipe stream log-stream #js {:end false})
         (-> (.-modem container)
             (.demuxStream stream log-stream log-stream)))
-      (.on stream "end" #(.end log-stream "!stop!"))
+      (.on stream "end" #(.end log-stream))
+
       (swap! ctx assoc-in [:services service cidx :log-stream] stream))))
 
 (defn update-container