[RUBY] Specify mysql socket in Hanami

Do this

Hanami :: Model internally calls ROM (ruby orm)

Can be passed with query parameter

DATABASE_URL="mysql2://root:password@host/database?socket=/mysql/mysql.sock"

reference

https://rom-rb.org/learn/sql/3.2/#mysql

Hanami on Cloud Run

This time I had to specify socket to connect to cloud sql on GCP cloud run

Connect via cloud sql proxy

DATABASE_URL="mysql2://root:password@host/database?socket=/cloudsql/<DATABASE_CONNECTION_NAME>"

Hanami has little literature, so let's actively output it.