Add test workflow.

config/docker/prepare-tests.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/bash -eu
+# Used as an entrypoint by the Docker image to prepare the test database before running the test suite.
+
+setup_database() {
+  RAILS_ENV=test bin/rails db:test:prepare
+}
+
+# create the post_versions and pool_versions tables needed by the test suite.
+setup_archives() {
+  mkdir ~/archives
+  cd ~/archives
+  git clone https://github.com/evazion/archives .
+  gem install bundler -v 1.13.3
+  bundle install --binstubs
+  RAILS_ENV=test bin/rake db:migrate
+}
+
+setup_database
+setup_archives