docs: add missing Oracle

kenjis · kenjis · commit 66e67b6b6e35 · 2024-01-17T08:59:16.000+09:00
diff --git a/src/docker/README.md b/src/docker/README.md
@@ -5,6 +5,7 @@
 - PostgreSQL 13
 - SQL Server 2019
 - MySQL 8.0
+- Oracle Database 21c XE
 - MailHog
 
 ## Usage
