add our demo proposal (#2436)

contributions/demo/week3/samkh-atheers/README.md

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+# Assignment Proposal
+
+## Title
+
+Continous Deployment and Rollback using Railway
+
+## Names and KTH ID
+
+  - Sam Khosravi ([email protected])
+  - Atheer Salim ([email protected])
+
+## Deadline
+
+- Week 3
+
+## Category
+
+- Demo
+
+## Description
+
+Our demo will show how one can deploy their github project using Railway, we will show how to set up the connection with Railway so that the project becomes deployed. 
+Then we will show how the application redeploys when the code changes (continuous deployment). 
+Finally we will show one can perform a rollback to previous deployment using Railway. 
+Along the way we will also showcase relevant features that Railway provides that are tied with the demo like showing build logs, and deployment logs,
+where one can set environment variables, and monitor resource usage (here, we will only show the CPU and memory usage of the deployment). 
+
+**Relevance**
+
+The proposal is relevant to DevOps as it shows how Railway can be used as tool to perform Continuous Deployment (CD) which is a big part of DevOps. 
+Also we are showing rollbacks which is also an important feature to have when using Continous Deployment, and finally we are introducing Railway to everyone in the 
+class (Railway has never been showcased before) which can be used to deploy various other things like databases and docker images. 
+
+
+