Update .dockerignore/.gitignore for #16947 etc (#17099)

* Update .dockerignore

* Update .gitignore

.dockerignore

@@ -15,6 +15,7 @@ vendor/bundle
 *.swp
 *~
 postgres
+postgres14
 redis
 elasticsearch
 chart

.gitignore

@@ -40,6 +40,7 @@
 
 # Ignore postgres + redis + elasticsearch volume optionally created by docker-compose
 /postgres
+/postgres14
 /redis
 /elasticsearch