Add activesupport to dockerfile

[sonalkr132]

Fixes:

/usr/local/bundle/gems/activesupport-7.0.0/lib/active_support/xml_mini.rb:184:in
`current_thread_backend': uninitialized constant
ActiveSupport::XmlMini::IsolatedExecutionState (NameError)

Related: Shopify/krane#851

[simi]

This is acutally not needed since Shopify/krane@dbeac43. Have you had any problems related to this?

[simi]

[retro@retro  rubygems-shipit (include-secrets=)]❤ gem install krane:2.4.6
Fetching krane-2.4.6.gem
Fetching activesupport-7.0.2.3.gem
Successfully installed activesupport-7.0.2.3
Successfully installed krane-2.4.6
Parsing documentation for activesupport-7.0.2.3
Installing ri documentation for activesupport-7.0.2.3
Parsing documentation for krane-2.4.6
Installing ri documentation for krane-2.4.6
Done installing documentation for activesupport, krane after 1 seconds
2 gems installed
[retro@retro  rubygems-shipit (include-secrets=)]❤ krane help
Krane commands:
  krane deploy NAMESPACE CONTEXT                        # Ship resources to a namespace
  krane global-deploy CONTEXT --selector='label=value'  # Ship non-namespaced resources to a cluster
  krane help [COMMAND]                                  # Describe available commands or one specific command
  krane render                                          # Render templates
  krane restart NAMESPACE CONTEXT                       # Restart the pods in one or more deployments
  krane run NAMESPACE CONTEXT f, --template=TEMPLATE    # Run a pod that exits upon completing a task
  krane version                                         # Prints the version

[retro@retro  rubygems-shipit (include-secrets=)]❤ gem list | grep activesupport
activesupport (7.0.2.3)