title: Updating Strapi Docker package.json
body: <p>I'm in the process of learning about Docker by trying to containerify a Strapi CMS. The default Docker image (<a href="https://github.com/strapi/strapi-docker" rel="nofollow noreferrer">https://github.com/strapi/strapi-docker</a>) works well enough as a starting point, but I'm trying to add a couple packages to the Strapi instance for my needs (adding in Azure storage account support using <a href="https://www.npmjs.com/package/strapi-provider-upload-azure-storage" rel="nofollow noreferrer">https://www.npmjs.com/package/strapi-provider-upload-azure-storage</a>). As I'm new to Docker, I'm having a hard time figuring how to make the container install that package as part of the Docker run process. </p>
  
  <p>I see that the strapi/base image Dockerfile contains this line referencing a package.json file: </p>
  
  <blockquote>
    <p>COPY ./package.json ./</p>
  </blockquote>
  
  <p>I'm assuming that's where I would add a reference to the packages I'm wanting to install so that later on they are installed by npm, but I'm not sure where that package.json file is located, let alone how to modify it. </p>
  
  <p>Any help on figuring out how to install that package during the Docker run process is greatly appreciated!</p>