Revise integrations docs

docs/integrations/frameworks/fiber.mdx

@@ -7,4 +7,21 @@ Prerequisites:
 - Set up and add envars to [Infisical Cloud](https://app.infisical.com)
 - [Install the CLI](/cli/overview)
 
-Coming soon.
+## Initialize Infisical for your [Fiber](https://gofiber.io/) app
+
+```bash
+# navigate to the root of your of your project 
+cd /path/to/project
+
+# then initialize Infisical
+infisical init
+```
+
+## Start your application as usual but with Infisical
+
+```bash
+infisical run -- <your application start command>
+
+# Example 
+infisical run -- go run server.go
+```