Build local product stack with Vault-managed secrets (#42)

.gitignore

@@ -34,3 +34,9 @@ pnpm-debug.log*
 /backend/notifications/interface/notifications/**/*.pb.go
 /backend/notifications/config.yml
 /backend/notifications/notifications
+
+# Local container pins, Vault bootstrap material and service identities
+/.local/
+
+# Python bytecode
+__pycache__/