clean hot-import example code

examples/hot-import-bot/README.md

 # HOT-IMPORT LISTENSER
 
-**PR from @xinbenlv**
+## PR From @xinbenlv
 
 Hot import Wechaty listenser functions after change the source code without restart the program
 
@@ -12,16 +12,20 @@ The hot-import is based on an npm package [hot-import](https://www.npmjs.com/pac
 Not to be confused by the directory `../hot-reload-bot` which is a hand written
 hot reload approach proposed by [Gcaufy](https://github.com/Gcaufy)
 
-
 ## Run
 
- ```shell
- docker run -t -i --rm --name wechaty --mount type=bind,source="$(pwd)",target=/bot zixia/wechaty index.js
- ```
+```shell
+$ docker run -t -i --rm --name wechaty --mount type=bind,source="$(pwd)",target=/bot zixia/wechaty index.js
+
+# Enable LOG
+$ docker run -t -i --rm --name wechaty -e WECHATY_LOG=verbose --mount type=bind,source="$(pwd)",target=/bot zixia/wechaty index.js
+```
 
 Or
 
 ```shell
-./run-hot-import-bot.sh
-```
+$ ./run-hot-import-bot.sh
 
+# Enable LOG
+$ WECHATY_LOG=verbose ./run-hot-import-bot.sh
+```

examples/hot-import-bot/listeners/on-scan.js

@@ -21,6 +21,6 @@ export default async function onScan (url, code) {
   console.log(code, url)
 
   if (code === 0) {
-    require('qrcode-terminal').generate(loginUrl)
+    require('qrcode-terminal').generate(loginUrl, {small: true})
   }
 }

examples/hot-import-bot/run-hot-import-bot.sh

 #!/usr/bin/env bash
 set -e
 
-docker run -t -i --rm --name wechaty --mount type=bind,source="$(pwd)",target=/bot zixia/wechaty index.js
+docker run -t -i --rm --name wechaty -e WECHATY_LOG="$WECHATY_LOG" --mount type=bind,source="$(pwd)",target=/bot zixia/wechaty index.js

examples/hot-reload-bot/index.js

@@ -113,7 +113,7 @@ console.log(`
 
 ATTENTION: This example is DEPRECATED.
 
-Please see https://github.com/Chatie/wechaty/tree/master/examples/hot-reload-bot instead.
+Please see https://github.com/Chatie/wechaty/tree/master/examples/hot-import-bot instead.
 
 `)