Propose introducing codeowners for GitHub reviewer assignent (#1093)

Co-authored-by: Henrik Skog <[email protected]>

.github/CODEOWNERS

@@ -0,0 +1,54 @@
+# Code owner file for Monoweb.
+#
+# We don't take this very seriously, but they are really useful for making
+# GitHub auto-assign reviewers to PRs. It makes it easier for contributors to
+# get pull requests reviewed.
+#
+# Another goal is also that people who have more experience with certain parts
+# of the codebase get the responsibility to review patches that touch these
+# parts.
+
+
+# Until we have more defined responsibilities, I'll take ownership of code that
+# is not covered by other, because I know every part of the codebase well.
+*                     @junlarsen
+
+
+# Pipelines and automation
+.github               @junlarsen
+*.Dockerfile          @junlarsen
+docker-compose.yml    @junlarsen
+
+
+# Main applications
+apps/brevduen         @junlarsen
+apps/dashboard        @henrikskog
+apps/rpc              @junlarsen
+apps/invoicification  @junlarsen
+apps/rif              @junlarsen
+apps/web              @jotjern
+
+
+# Libraries and packages
+packages/auth         @junlarsen @jotjern
+packages/config
+packages/core         @junlarsen @jotjern @henrikskog @terbau
+packages/db           @jotjern
+packages/email
+packages/environment  @junlarsen
+packages/gateway-trpc @junlarsen @jotjern @henrikskog @terbau
+packages/logger       @junlarsen
+packages/proxy-nextjs @junlarsen
+packages/tsconfig
+packages/types
+packages/ui           @brage-andreas @madsab
+packages/utils        @brage-andreas
+
+
+# Tools
+tools/migrator        @jotjern @junlarsen
+tools/shell           @henrikskog
+
+
+# Infrastructure located in the monorepo
+infra/auth0           @henrikhorluck @jotjern