Update 101-process-env.md (#1962)

* Update 101-process-env.md

* Update content/roadmaps/107-nodejs/content/106-nodejs-command-line-apps/104-environment-variables/101-process-env.md

Co-authored-by: Kamran Ahmed <kamranahmed.se@gmail.com>

content/roadmaps/107-nodejs/content/106-nodejs-command-line-apps/104-environment-variables/101-process-env.md

@@ -1 +1,7 @@
-# Process env
+# process.env
+
+In Node. js, process. env is a global variable that is injected during runtime. It is a view of the state of the system environment variables. When we set an environment variable, it is loaded into process.env during runtime and can later be accessed.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.knowledgehut.com/blog/web-development/node-environment-variables'>Process.env Node</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.geeksforgeeks.org/node-js-process-env-property/'>Node.js process.env Property</BadgeLink>