update readme

Author: niqdev

README.md

@@ -290,15 +290,15 @@ More info about Heroku [Scheduler](https://devcenter.heroku.com/articles/schedul
 
 Build your image
 ```
-docker build -t niqdev/packtpub-crawler:2.2.6 .
+docker build -t niqdev/packtpub-crawler:2.3.0 .
 ```
 
 Run manually
 ```
 docker run \
   --rm \
   --name my-packtpub-crawler \
-  niqdev/packtpub-crawler:2.2.6 \
+  niqdev/packtpub-crawler:2.3.0 \
   python script/spider.py --config config/prod.cfg
 ```
 
@@ -307,7 +307,7 @@ Run scheduled crawler in background
 docker run \
   --detach \
   --name my-packtpub-crawler \
-  niqdev/packtpub-crawler:2.2.6
+  niqdev/packtpub-crawler:2.3.0
 
 # useful commands
 docker exec -i -t my-packtpub-crawler bash

script/spider.py

@@ -60,7 +60,7 @@ def main():
     parser = argparse.ArgumentParser(
         description='Download FREE eBook every day from www.packtpub.com',
         formatter_class=argparse.ArgumentDefaultsHelpFormatter,
-        version='2.2.6')
+        version='2.3.0')
 
     parser.add_argument('-c', '--config', required=True, help='configuration file')
     parser.add_argument('-d', '--dev', action='store_true', help='only for development')