fix: Fix and rename pg_database_url.sh helper script (#2747)

- Fix and rename pg_database_url helper script
- Use single-quote and remove trailing whitespace

docker/entrypoints/helpers/pg_database_url.rb

@@ -5,6 +5,6 @@ require 'uri'
 if !ENV['DATABASE_URL'].nil? && ENV['DATABASE_URL'] != ''
   uri = URI(ENV['DATABASE_URL'])
   puts "export POSTGRES_HOST=#{uri.host} POSTGRES_PORT=#{uri.port} POSTGRES_USERNAME=#{uri.user}"
-elif ENV['POSTGRES_PORT'].nil? || ENV['POSTGRES_PORT'] == ''
-  puts "export POSTGRES_PORT=5432" 
+elsif ENV['POSTGRES_PORT'].nil? || ENV['POSTGRES_PORT'] == ''
+  puts 'export POSTGRES_PORT=5432'
 end

docker/entrypoints/rails.sh

@@ -10,7 +10,7 @@ echo "Waiting for postgres to become ready...."
 
 # Let DATABASE_URL env take presedence over individual connection params.
 # This is done to avoid printing the DATABASE_URL in the logs
-$(docker/entrypoints/helpers/pg_database_url.sh)
+$(docker/entrypoints/helpers/pg_database_url.rb)
 PG_READY="pg_isready -h $POSTGRES_HOST -p $POSTGRES_PORT -U $POSTGRES_USERNAME"
 
 until $PG_READY