Fix a tiny typo on documentation (#632)

* Fix typo

* Revise a sentence on documentation

README.md

@@ -62,7 +62,7 @@ $ cd deploy/
 # You may choose another backend by pointing to the
 # appropriate docker-compose file.
 $ docker-compose -f docker-compose.sqlite.yml build
-$ docker-compose -f docker-compose.sqlite.yml up 
+$ docker-compose -f docker-compose.sqlite.yml up
 ```
 
 Access the website by going to [localhost:9999](http://localhost:9999).
@@ -92,4 +92,4 @@ Access the website by going to [localhost:9999](http://localhost:9999).
 This project is licensed under the MIT License - see the LICENSE.md file for details
 
 # Disclaimer
-We take no legal responsibility for anything this code is used for. This is an purely an educational proof of concept.
+We take no legal responsibility for anything this code is used for. This is purely an educational proof of concept.