VS Code dev container fails to start

[araffin]

After clicking "open in dev container", building the docker image installing the dependencies, I get:

Running the postAttachCommand from devcontainer.json...

[97012 ms] Start: Run in container: /bin/sh -c ./bin/entry_point.sh
Entry point script running
Gemfile.lock is tracked by git, keeping it intact
  Logging at level: debug
    Jekyll Version: 4.4.1
Configuration file: /workspaces/26_ICLR_blogposts/_config.yml
  Logging at level: debug
    Jekyll Version: 4.4.1

bundler: failed to load command: jekyll (/usr/local/rvm/gems/default/bin/jekyll)
/usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/cache.rb:181:in `initialize': Permission denied @ rb_sysopen - /workspaces/26_ICLR_blogposts/.jekyll-cache/Jekyll/Cache/Jekyll--Cache/b7/9606fb3afea5bd1609ed40b622142f1c98125abcfe89a76a661b0e8e343910 (Errno::EACCES)

Full traceback:

bundler: failed to load command: jekyll (/usr/local/rvm/gems/default/bin/jekyll)
/usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/cache.rb:181:in `initialize': Permission denied @ rb_sysopen - /workspaces/26_ICLR_blogposts/.jekyll-cache/Jekyll/Cache/Jekyll--Cache/b7/9606fb3afea5bd1609ed40b622142f1c98125abcfe89a76a661b0e8e343910 (Errno::EACCES)
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/cache.rb:181:in `open'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/cache.rb:181:in `dump'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/cache.rb:97:in `[]='
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/cache.rb:41:in `clear_if_config_changed'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/site.rb:118:in `reset'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/site.rb:35:in `initialize'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/commands/build.rb:30:in `new'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/commands/build.rb:30:in `process'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/command.rb:91:in `block in process_with_graceful_fail'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/command.rb:91:in `each'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/command.rb:91:in `process_with_graceful_fail'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/lib/jekyll/commands/serve.rb:85:in `block (2 levels) in init_with_program'
        from /usr/local/rvm/gems/default/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `block in execute'
        from /usr/local/rvm/gems/default/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `each'
        from /usr/local/rvm/gems/default/gems/mercenary-0.4.0/lib/mercenary/command.rb:221:in `execute'
        from /usr/local/rvm/gems/default/gems/mercenary-0.4.0/lib/mercenary/program.rb:44:in `go'
        from /usr/local/rvm/gems/default/gems/mercenary-0.4.0/lib/mercenary.rb:21:in `program'
        from /usr/local/rvm/gems/default/gems/jekyll-4.4.1/exe/jekyll:15:in `<top (required)>'
        from /usr/local/lib/ruby/site_ruby/3.3.0/rubygems.rb:319:in `load'
        from /usr/local/lib/ruby/site_ruby/3.3.0/rubygems.rb:319:in `activate_and_load_bin_path'
        from /usr/local/rvm/gems/default/bin/jekyll:25:in `<top (required)>'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/cli/exec.rb:59:in `load'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/cli/exec.rb:59:in `kernel_load'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/cli/exec.rb:23:in `run'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/cli.rb:452:in `exec'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/vendor/thor/lib/thor/command.rb:28:in `run'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/vendor/thor/lib/thor/invocation.rb:127:in `invoke_command'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/vendor/thor/lib/thor.rb:538:in `dispatch'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/cli.rb:35:in `dispatch'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/vendor/thor/lib/thor/base.rb:584:in `start'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/cli.rb:29:in `start'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/exe/bundle:28:in `block in <top (required)>'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/lib/bundler/friendly_errors.rb:117:in `with_friendly_errors'
        from /usr/local/rvm/gems/default/gems/bundler-2.6.9/exe/bundle:20:in `<top (required)>'
        from /usr/local/lib/ruby/site_ruby/3.3.0/rubygems.rb:319:in `load'
        from /usr/local/lib/ruby/site_ruby/3.3.0/rubygems.rb:319:in `activate_and_load_bin_path'
        from /usr/local/rvm/gems/default/bin/bundle:25:in `<main>'

would it be possible to provide a simple docker image instead?

Environment:

VS Code version: 1.104.3
Dev Containers extension version: 0.427.0
OS: Ubuntu 24.04
Docker version: 28.5.0