ADR: use monorepository

Signed-off-by: Victor Login <batazor@evrone.com>

docs/ADR/README.md

@@ -22,6 +22,7 @@ for information team about cases for updated ADR.
     - [ADR-0001](./decisions/0001-record-architecture-decisions.md) - Record architecture decisions
     - [ADR-0006](./decisions/0006-codeowner.md) - Codeowner
     - [ADR-0011](./decisions/0011-application-architecture-documentation.md) - Application architecture documentation
+    - [ADR-0012](./decisions/0012-use-monorepository.md) - Use monorepository
 - **Naming**
     - [ADR-0002](./decisions/0002-implement-as-event-naming.md) - Implement as event naming
     - [ADR-0009](./decisions/0009-naming-spans-and-attributes.md) - Naming spans and attributes

docs/ADR/decisions/0012-use-monorepository.md

@@ -0,0 +1,21 @@
+# 12. Use monorepository
+
+Date: 2023-01-14
+
+## Status
+
+Accepted
+
+## Context
+
+We want to have a monorepository for the platform.
+
+## Decision
+
+We use a monorepository for the platform.
+
+- [Understanding Monorepos](https://monorepo.tools/#understanding-monorepos)
+
+## Consequences
+
++ We have a monorepository for the platform.