Apply suggestions from code review

Co-authored-by: Oliver Windall Juhl <59018053+olivermrbl@users.noreply.github.com>

Dockerfile

@@ -12,7 +12,7 @@ RUN apt-get install -y python
 
 RUN npm install -g npm@latest
 
-RUN npm install -g @medusajs/medusa-cli
+RUN npm install -g @medusajs/medusa-cli@latest
 
 RUN npm install
 

README.md

@@ -32,7 +32,7 @@ This starter has minimal prerequisites and most of these will usually already be
 - [Install git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
 - [Install SQLite](https://www.sqlite.org/download.html)
 
-## Setting up your store SQLite
+## Setting up your store
 
 - Install the Medusa CLI
   ```
@@ -51,7 +51,7 @@ This starter has minimal prerequisites and most of these will usually already be
 
 Your local Medusa server is now running on port **9000**.
 
-## Setting up your store with docker and postgres
+## Setting up your store with Docker
 
 - Create a new Medusa project
   ```