Merge of DC changes to date.

Dockerfile

@@ -19,8 +19,8 @@ FROM ruby:2.7.1-alpine as base
 # we need _a_ worldcon number
 ARG WORLDCON_NUMBER
 
-# and by default that'll be Chicago :)
-ENV WORLDCON_NUMBER ${WORLDCON_NUMBER:-worldcon80}
+# and by default that'll be Chicago/xxxxxxxx DC :)
+ENV WORLDCON_NUMBER ${WORLDCON_NUMBER:-worldcon79}
 
 RUN apk add \
       build-base \

Gemfile

@@ -38,6 +38,7 @@ gem "redcarpet"            # markdown parser for displaying simple markup on tex
 gem "seedbank"             # For customizing seeds for all cons
 gem "sidekiq"              # Background jobs processor
 gem "sidekiq-scheduler"    # Background jobs processor scheduler
+gem "strip_attributes"     # ActiveModel extension to remove leading and trailing spaces
 gem "stripe", "~> 4"       # payment provider, locked for https://github.com/rebelidealist/stripe-ruby-mock/pull/643
 gem "tiny_tds"             # adapters for Dave's Hugo integration
 gem "webpacker"            # a JavaScript module bundler, takes modules with dependencies and generates static assets