docs(contribution-guidelines): add best practices for Backend and add…

…ed the sections Features, API, and Design.

apps/docs/src/content/docs/contribution-guidelines/coding-guidelines.mdx

@@ -141,6 +141,29 @@ All tests can be viewed on the github workflow.
 
 When running different tests, make sure you select the right environments for each of these tests. 
 
+### **Backend**
+
+#### Adding issues
+When working on an issue, making commits with description when necessary. 
+- For example, when generating a library(ex: a database library) that will be used,
+  indicate the command used to generate that library in the commit description. 
+- Additionally, when working on an issue, begin with defining the requirements to a given issue 
+  before attempting to resolve it. 
+
+Be cautious when modifying tsconfig files.
+- Frequent modifications to tsconfig files can lead to a snowball effect when adding features
+  or modifying existing features. 
+
+
+### **Features**
+TBD
+
+
+### **API**
+TBD
+
+### **Design**
+