Merge pull request #122 from fly-apps/119-generate-run-errors-for-erb…

…-controlled-databaseyml-files

recover from database.yml parse failures

lib/generators/dockerfile_generator.rb

@@ -1277,7 +1277,7 @@ def compose_web_volumes
     volumes = %w[ log storage ]
 
     if deploy_database == "sqlite3"
-      database = YAML.load_file("config/database.yml", aliases: true).dig("production", "database")
+      database = YAML.load_file("config/database.yml", aliases: true).dig("production", "database") rescue nil
       if database && database =~ /^\w/
         volumes << File.dirname(database)
       end