Updates to fully disable the segment plugin on dev builds

This update conditionally removes the docusaurus-plugin-segment plugin for dev builds. A note with information about testing in production mode has also been added to the Contributing guidelines.

CONTRIBUTING.md

@@ -171,4 +171,14 @@ CodeSandbox entry point, and more complex code blocks that can be loaded directl
 filesystem.
 See the
 [`remark-codesandbox` documentation](https://github.com/kevin940726/remark-codesandbox/#documentation)
-for more information.
+for more information.
+
+## Analytics
+
+The [`docusaurus-plugin-segment`](https://github.com/xer0x/docusaurus-plugin-segment) plugin enables simple usage analytics to inform documentation improvements that may be needed.
+
+If you need to test analytics events in your local development enviorment be sure to export the appropriate key for the environment you are testing against before building and running the project:
+
+```bash
+export SEGMENT_ANALYTICS_KEY="<your key>"
+```

docusaurus.config.js

@@ -4,6 +4,7 @@
 const codeTheme = require("prism-react-renderer/themes/dracula");
 const remarkCodesandbox = require("remark-codesandbox");
 const path = require("path");
+const isProd = process.env.NODE_ENV === 'production';
 
 /** @type {import('@docusaurus/types').Config} */
 const config = {
@@ -366,14 +367,15 @@ const config = {
         },
       },
     ],
+    isProd ? 
     [
       "docusaurus-plugin-segment",
       {
         apiKey: process.env.SEGMENT_ANALYTICS_KEY,
         load: {cookie: { sameSite: 'None', secure: true}},
         page: true,
       },
-    ],
+    ] : null,
   ],
   themeConfig:
     /** @type {import('@docusaurus/preset-classic').ThemeConfig} */