add characters index page

config/database.yml

@@ -20,10 +20,10 @@ default: &default
   # For details on connection pooling, see Rails configuration guide
   # https://guides.rubyonrails.org/configuring.html#database-pooling
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
-  username: <%= ENV['DATABASE_URL'] %>
-  password: <%= ENV['DATABASE_URL'] %>
-  host: <%= ENV['DATABASE_URL'] %>
-  port: <%= ENV['DATABASE_URL'] %>
+  username: <%= ENV['DATABASE_USERNAME'] %>
+  password: <%= ENV['DATABASE_PASSWORD'] %>
+  host: <%= ENV['DATABASE_HOST'] %>
+  port: <%= ENV['DATABASE_PORT'] %>
 
 development:
   <<: *default
@@ -84,4 +84,6 @@ test:
 # for a full overview on how database connection configuration can be specified.
 #
 production:
+  adapter: postgresql
+  encoding: unicode
   url: <%= ENV['DATABASE_URL'] %>