Docs: create initial spelling list

This commit adds a spelling test to Vale, and creates an initial
spelling exceptions list. The exceptions list is incomplete, and
needs more work.

doc/.vale/gitlab/Spelling.yml

+# Checks for possible spelling mistakes in content, not code. May find false positives
+# due to links using angle brackets: <https://example.com>. These can be ignored.
+#
+# If a word is flagged as a spelling mistake incorrectly, such as a product name,
+# you can submit an MR to update `spelling-exceptions.txt` with the missing word.
+# Commands, like `git clone` must use backticks, and must not be added to the
+# exceptions.
+#
+# For a list of all options, see https://errata-ai.github.io/vale/styles/
+extends: spelling
+message: 'Spelling check: "%s"?'
+level: warning
+ignore:
+  - gitlab/spelling-exceptions.txt

doc/.vale/gitlab/spelling-exceptions.txt

+Akismet
+Alertmanager
+Algolia
+Ansible
+API
+approvers
+Artifactory
+Asana
+Asciidoctor
+Atlassian
+Auth0
+Authentiq
+autocomplete
+autocompleted
+autocompletes
+autocompleting
+autogenerated
+autoloaded
+autoloader
+autoloading
+autoscale
+autoscaled
+autoscaler
+autoscales
+autoscaling
+awardable
+Azure
+backport
+backported
+backporting
+backports
+backtrace
+backtraced
+backtraces
+backtracing
+Bamboo
+Bitbucket
+blockquote
+blockquoted
+blockquotes
+blockquoting
+boolean
+browsable
+Bugzilla
+Buildkite
+buildpack
+buildpacks
+bundler
+bundlers
+burndown
+cacheable
+CAS
+CentOS
+Chatops
+Citrix
+Cloudwatch
+Cognito
+colocated
+colocating
+compilable
+composable
+Conda
+Consul
+cron
+crons
+crontab
+crontabs
+crosslinked
+crosslinking
+crosslinks
+Crossplane
+CrowdIn
+Debian
+deduplicate
+deduplicated
+deduplicates
+deduplicating
+deduplication
+deprovision
+deprovisioned
+deprovisioning
+deprovisions
+discoverability
+Disqus
+Dockerfile
+Dockerfiles
+downvoted
+downvotes
+Dpl
+Elasticsearch
+enablement
+enqueued
+expirable
+Facebook
+failover
+failovers
+failsafe
+favicon
+firewalled
+Flowdock
+Fluentd
+Forgerock
+Gantt
+Gemnasium
+Git
+Gitaly
+Gitea
+GitHub
+GitLab
+gitlabsos
+Gitter
+Gmail
+Google
+Gradle
+Grafana
+gravatar
+hardcode
+hardcoded
+hardcodes
+Helm
+HipChat
+hostname
+hostnames
+hotfix
+hotfixed
+hotfixes
+hotfixing
+http
+https
+Ingress
+initializer
+initializers
+interdependencies
+interdependency
+Irker
+jasmine-jquery
+JavaScript
+Jaeger
+Jenkins
+Jira
+jQuery
+JupyterHub
+kanban
+kanbans
+Karma
+Kerberos
+Kibana
+Knative
+Kramdown
+Kubernetes
+Laravel
+LDAP
+Libravatar
+Lograge
+lookahead
+lookaheads
+lookbehind
+lookbehinds
+lookups
+Lucene
+Maildir
+Makefile
+Makefiles
+Markdown
+markdownlint
+Mattermost
+mbox
+mergeable
+Microsoft
+middleware
+middlewares
+MinIO
+mitmproxy
+misconfigure
+misconfigured
+misconfigures
+misconfiguration
+misconfigurations
+misconfiguring
+mitigations
+mockup
+mockups
+nameserver
+nameservers
+namespace
+namespaced
+namespaces
+Nanoc
+NGINX
+OAuth
+Okta
+offboarded
+offboarding
+offboards
+OmniAuth
+OpenID
+OpenShift
+Packagist
+parallelization
+parallelizations
+performant
+Piwik
+PgBouncer
+plaintext
+PostgreSQL
+preconfigure
+preconfigured
+preconfigures
+prefill
+prefilled
+prefilling
+prefills
+prepend
+prepended
+prepends
+Pritaly
+profiler
+Prometheus
+proxied
+proxies
+proxying
+Pseudonymized
+Pseudonymizer
+Puma
+Python
+Qualys
+Rackspace
+Raketask
+Raketasks
+rebase
+rebased
+rebases
+rebasing
+Redis
+Redmine
+reCAPTCHA
+referer
+referers
+reindex
+reindexed
+reindexes
+reindexing
+relicensing
+Repmgr
+Repmgrd
+requeue
+requeued
+requeues
+reusability
+resynced
+resyncing
+resyncs
+rollout
+rollouts
+rsync
+rsynced
+rsyncing
+rsyncs
+resync
+reverified
+reverifies
+reverify
+runbook
+runbooks
+runit
+runtime
+runtimes
+Salesforce
+SAML
+Sendmail
+Sentry
+serverless
+Sidekiq
+sharding
+Shibboleth
+sanitization
+serializer
+serializers
+serializing
+Slack
+Slony
+SMTP
+Sourcegraph
+Splunk
+SSH
+storable
+strace
+subfolder
+subfolders
+sublicense
+sublicensed
+sublicenses
+sublicensing
+subnet
+subnets
+subnetting
+subtree
+subtrees
+subqueried
+subqueries
+subquery
+subquerying
+syslog
+Tiller
+todos
+tokenizer
+Tokenizers
+tokenizing
+toolchain
+toolchains
+tooltip
+tooltips
+Trello
+triaging
+TypeScript
+Twitter
+Ubuntu
+unarchive
+unarchived
+unarchives
+Unassign
+Unassigns
+uncheck
+unchecked
+unchecking
+unchecks
+uncomment
+uncommented
+unencrypted
+Unicorn
+unindexed
+unlink
+unlinking
+unlinks
+unmergeable
+unmerged
+unmerges
+unmerging
+unoptimize
+unoptimized
+unoptimizes
+unoptimizing
+unprotect
+unprotects
+unprotected
+unpublish
+unpublished
+unpublishes
+unreferenced
+unresolve
+unresolved
+unresolving
+unstage
+unstaged
+unstages
+unstaging
+untracked
+untrusted
+unverified
+unverifies
+unverify
+unverifying
+uploader
+uploaders
+upvoted
+upvotes
+validator
+validators
+vendored
+virtualized
+virtualizing
+Vue
+Vuex
+walkthrough
+walkthroughs
+WebdriverIO
+webpack
+webserver
+whitepaper
+whitepapers
+Wireshark
+Wordpress
+Xcode
+Xeon
+YouTrack
+Zeitwerk
+Zendesk