chore(docs): Remove --save from READMEs (#27032)

Co-authored-by: Lennart <[email protected]>

Author: yashints

docs/blog/2017-02-21-1-0-progress-update-where-came-from-where-going/index.md

@@ -230,7 +230,7 @@ Themes (like plugins) will be published on npm. So soon, starting a new Gatsby
 blog will be as simple as:
 
 ```shell
-npm install --save gatsby-super-cool-theme
+npm install gatsby-super-cool-theme
 gatsby build --theme gatsby-super-cool-theme
 ```
 

docs/blog/2017-07-19-creating-a-blog-with-gatsby/index.md

@@ -84,7 +84,7 @@ with the following command:
 yarn add gatsby-plugin-catch-links gatsby-plugin-react-helmet
 ```
 
-You will be using [yarn][yarn], but npm can just as easily be used with `npm i --save [deps]`.
+You will be using [yarn][yarn], but npm can just as easily be used with `npm install [deps]`.
 
 After installing each of these functional plugins, edit
 `gatsby-config.js`, which Gatsby loads at build-time to implement the exposed

docs/blog/2017-10-01-migrating-my-blog-from-hexo-to-gatsby/index.md

@@ -181,7 +181,7 @@ Let's fix that. We need to teach Gatsby how to query the file system. Luckily
 this is so common it's been done for you. Install the file system source plugin:
 
 ```shell
-npm i --save gatsby-source-filesystem
+npm install gatsby-source-filesystem
 ```
 
 Now modify `gatsby-config.js` to both use the plugin and tell it what directory
@@ -230,7 +230,7 @@ files this is all you will need. But if you want to render markdown files as
 HTML you will need another plugin. Let's add that now:
 
 ```shell
-npm i --save gatsby-transformer-remark
+npm install gatsby-transformer-remark
 ```
 
 As before, add it to the `plugins` field in `gatsby-config.js`:

docs/blog/2017-10-17-building-i18n-with-gatsby/index.md

@@ -74,7 +74,7 @@ implementation in other projects.
 
 To get started, you'll need to install a few packages:
 
-`npm i -S i18next i18next-xhr-backend i18next-browser-languagedetector react-i18next`
+`npm install i18next i18next-xhr-backend i18next-browser-languagedetector react-i18next`
 
 ## Setting up
 

docs/blog/2018-06-07-build-a-gatsby-blog-using-the-cosmic-js-source-plugin/index.md

@@ -69,13 +69,13 @@ In our case, we are using [Cosmic](https://cosmicjs.com). We need a source plugi
 Install the source plugin with the following command:
 
 ```shell
-npm install --save gatsby-source-cosmicjs
+npm install gatsby-source-cosmicjs
 ```
 
 We're going to use a couple other plugins later, so let's install them here:
 
 ```shell
-npm install --save gatsby-plugin-offline gatsby-source-filesystem
+npm install gatsby-plugin-offline gatsby-source-filesystem
 ```
 
 These plugins need some configuration, so let's replace the content of `gatsby-config.js` with:
@@ -424,7 +424,7 @@ Restart the Gatsby server, then visit the detail page by clicking on URLs displa
 
 In addition to the code covered in this tutorial, we also implemented `src/components/bio.js` to display author information & `src/layouts/index.js` to [create a generic layout](/tutorial/part-three/#our-first-layout-component) for the blog.
 
-The source code for this tutorial is available [on GitHub](https://github.com/cosmicjs/gatsby-blog-cosmicjs). To see it live, clone the repository, and run (`cd gatsby-blog-cosmicjs && npm i && npm run develop`) or check out the [demo on Netlify](https://gatsby-blog-cosmicjs.netlify.app/).
+The source code for this tutorial is available [on GitHub](https://github.com/cosmicjs/gatsby-blog-cosmicjs). To see it live, clone the repository, and run (`cd gatsby-blog-cosmicjs && npm install && npm run develop`) or check out the [demo on Netlify](https://gatsby-blog-cosmicjs.netlify.app/).
 
 The static website generated by Gatsby can easily be published on services like Netlify, S3/CloudFront, GitHub Pages, GitLab Pages, Heroku, etc.
 

docs/blog/2018-1-18-strapi-and-gatsby/index.md

@@ -100,7 +100,7 @@ _Requirements: please make sure [Node 10](https://nodejs.org/en/download/) (or h
 Install Strapi using npm:
 
 ```shell
-npm i strapi@alpha -g
+npm install strapi@alpha -g
 ```
 
 _Note: Strapi v3 is still an alpha version, but it will be fine for this tutorial._
@@ -256,7 +256,7 @@ In this example, we are using Strapi. Obviously, we are going to need a source p
 Let's install it:
 
 ```shell
-npm install --save gatsby-source-strapi
+npm install gatsby-source-strapi
 ```
 
 This plugin needs to be configured. Replace the content of `gatsby-config.js` with:

docs/blog/2018-10-26-export-a-drupal-site-to-gatsby/index.md

@@ -21,8 +21,8 @@ To do this yourself, you'll build a simple blog using the excellent [gatsby-star
 ```shell
 gatsby new gatsby-blog https://github.com/gatsbyjs/gatsby-starter-blog
 git init # so you can keep track of the changes
-npm i # to install regular gastby requirements
-npm i --save-dev better-sqlite3 # to add an sqlite javascript client
+npm install # to install regular gastby requirements
+npm install --save-dev better-sqlite3 # to add an sqlite javascript client
 ```
 
 The useful commands on a sqlite3 command line to explore are `.tables` to see all tables :) and `.schema table_name` to see information about a specific table. Oh! and `.help` to know more.

docs/blog/2018-12-19-kentico-cloud-and-gatsby-take-you-beyond-static-websites/index.md

@@ -38,7 +38,7 @@ Kentico Cloud also makes it easy for editors to understand the hierarchical stru
 For us developers, the headless CMS tools are very important. Apart from great technical documentation and many SDKs (including [JavaScript](http://bit.ly/2Gsq0Tb)), Kentico Cloud has a [source plugin for Gatsby](http://bit.ly/2S8ZzTO). If you decide to build a static site like I did, it's just another package that you install via npm.
 
 ```shell
-npm install --save gatsby-source-kentico-cloud
+npm install gatsby-source-kentico-cloud
 ```
 
 which updates packages.json

docs/blog/2019-01-25-blazing-fast-development-with-gatsby-and-sanity-io/index.md

@@ -24,7 +24,7 @@ The Gatsby source plugin for Sanity comes with the ability to easily overlay dra
 Add the source plugin to your Gatsby project:
 
 ```shell
-npm install --save gatsby-source-sanity
+npm install gatsby-source-sanity
 ```
 
 The source plugin gives you a comprehensive GraphQL API in Gatsby for your structured content from Sanity. We strongly recommend using the [GraphiQL explorer](/docs/running-queries-with-graphiql/) to test queries and familiarize yourself with the schema documentation. It's super useful!

docs/blog/2019-03-18-releasing-new-schema-customization/index.md

@@ -11,7 +11,7 @@ Two weeks ago, we announced our plans for a [new schema customization API](/blog
 First, install the latest and greatest version of `gatsby`, like so:
 
 ```shell
-npm install gatsby --save
+npm install gatsby
 ```
 
 Next, continue reading below to see if any of the great, new features we've enabled scratch a particular itch. We feel very confident they will 💜