Add content for Serverless (#1104)

Add description and resources for serverless

content/roadmaps/101-backend/content/115-architectural-patterns/104-serverless.md

@@ -1 +1,8 @@
-# Serverless
+# Serverless
+
+Serverless is an architecture in which a developer builds and runs applications without provisioning or managing servers. With cloud computing/serverless, servers exist but are managed by the cloud provider. Resources are used as they are needed, on demand and often using auto scaling.
+
+<ResourceGroupTitle>Free Content</ResourceGroupTitle>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://www.ibm.com/cloud/learn/serverless'>Serverless</BadgeLink>
+<BadgeLink colorScheme='yellow' badgeText='Read' href='https://aws.amazon.com/serverless/'>AWS Services</BadgeLink>
+<BadgeLink badgeText='Watch' href='https://www.youtube.com/watch?v=W_VV2Fx32_Y&ab_channel=Fireship'>Serverless Computing in 100 Seconds</BadgeLink>