Comment 2 for bug 1879310

Other language bindings pull in ca-certificates by default. PHP either depends on ca-certificates through apache2 -> ssl-cert -> openssl or php-curl -> libcurl bindings. Ruby has an indirect dependency while nodejs has a direct dependency.

# apt install ruby
# aptitude why ca-certificates
i ruby Depends ruby2.7
i A ruby2.7 Depends rubygems-integration (>= 1.8)
i A rubygems-integration Depends ca-certificates