create basic backend with login

main-server/config/initializers/cors.rb

@@ -0,0 +1,9 @@
+Rails.application.config.middleware.insert_before 0, Rack::Cors do
+  allow do
+    origins ENV.fetch("CORS_ORIGINS", "*").split(",")
+    resource "*",
+      headers: :any,
+      methods: [:get, :post, :put, :patch, :delete, :options, :head],
+      expose: ["Authorization"]
+  end
+end

main-server/config/initializers/filter_parameter_logging.rb

@@ -0,0 +1,8 @@
+# Be sure to restart your server when you modify this file.
+
+# Configure parameters to be partially matched (e.g. passw matches password) and filtered from the log file.
+# Use this to limit dissemination of sensitive information.
+# See the ActiveSupport::ParameterFilter documentation for supported notations and behaviors.
+Rails.application.config.filter_parameters += [
+  :passw, :email, :secret, :token, :_key, :crypt, :salt, :certificate, :otp, :ssn, :cvv, :cvc
+]

main-server/config/initializers/inflections.rb

@@ -0,0 +1,16 @@
+# Be sure to restart your server when you modify this file.
+
+# Add new inflection rules using the following format. Inflections
+# are locale specific, and you may define rules for as many different
+# locales as you wish. All of these examples are active by default:
+# ActiveSupport::Inflector.inflections(:en) do |inflect|
+#   inflect.plural /^(ox)$/i, "\\1en"
+#   inflect.singular /^(ox)en/i, "\\1"
+#   inflect.irregular "person", "people"
+#   inflect.uncountable %w( fish sheep )
+# end
+
+# These inflection rules are supported but not enabled by default:
+# ActiveSupport::Inflector.inflections(:en) do |inflect|
+#   inflect.acronym "RESTful"
+# end