Add migrations to db section (#7175)

src/data/roadmaps/backend/backend.json

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src/data/roadmaps/backend/content/god-design-patterns@6XIWO0MoE-ySl4qh_ihXa.md

@@ -1,13 +0,0 @@
-# Design Patterns
-
-Design patterns are typical solutions to commonly occurring problems in software design. They can be broken into three categories:
-
-- Creational Patterns for the creation of objects
-- Structural Patterns to provide relationship between objects
-- Behavioral Patterns to help define how objects interact
-
-Visit the following resources to learn more:
-
-- [@opensource@Design Patterns for Humans](https://github.com/kamranahmedse/design-patterns-for-humans)
-- [@article@GOF design patterns](https://springframework.guru/gang-of-four-design-patterns/)
-- [@article@Design Patterns](https://refactoring.guru/design-patterns)

src/data/roadmaps/backend/content/migrations@ZsZvStCvKwFhlBYe9HGhl.md

@@ -0,0 +1,8 @@
+# Migrations
+
+Database migrations are a version-controlled way to manage and apply incremental changes to a database schema over time, allowing developers to modify the database structure (e.g., adding tables, altering columns) without affecting existing data. They ensure that the database evolves alongside application code in a consistent, repeatable manner across environments (e.g., development, testing, production), while maintaining compatibility with older versions of the schema. Migrations are typically written in SQL or a database-agnostic language, and are executed using migration tools like Liquibase, Flyway, or built-in ORM features such as Django or Rails migrations.
+
+Learn more from the following resources:
+
+- [@article@What are database migrations?](https://www.prisma.io/dataguide/types/relational/what-are-database-migrations)
+- [@video@Database Migrations for Beginners](https://www.youtube.com/watch?v=dJDBP7pPA-o)