Using htaccess to configure Apache and Passenger for Ruby - ruby

Question

I've been trying to install a ruby app called Openproject on my bluehost account. I followed the Openproject guide.
https://www.openproject.org/open-source/manual-installation/manual-installation-guide/
I updated ruby and node using rbenv and nodenv. I was able to follow up to the section "Finish the Installation of OpenProject," and I didn't get any error up to this point.
However, I wasn't sure how to tackle the section "Servce OpenProject with Apache and Passenger." The guide asks to configure apache to load the right passenger, but Bluehost doesn't provide access to httpd.conf. Then I found the guide for Ruby from Bluehost indicating that I can use .htaccess to configure.
https://my.bluehost.com/cgi/help/rails
I copied the .htaccess from the guide and put it in openproject/public folder.
However, if I open mydomain.com/openproject, it displays the list of files inside openproject folder. If I open mydomain.com/openproject/public, I get the error below. I also tried to move .htaccess to openproject folder instead of openproject/public, but I get the same result.
I noticed a couple of things from the error message, but I'm not sure how to fix them.
1. The error indicates "No such file or directory - config.ru," even though openproject folder has the file config.ru.
2. The error indicates that Application root is /home5/account/public_html. Shouldn't it be /home5/account/public_html/openproject?
Anyways, here's the entire error message.
Ruby (Rack) application could not be started
These are the possible causes:
There may be a syntax error in the application's code. Please check for such errors and fix them.
A required library may not installed. Please install all libraries that this application requires.
The application may not be properly configured. Please check whether all configuration files are written correctly, fix any incorrect configurations, and restart this application.
A service that the application relies on (such as the database server or the Ferret search engine server) may not have been started. Please start that service.
Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem.
Error message:
No such file or directory - config.ru Exception class:
Errno::ENOENT Application root: /home5/account/public_html
Backtrace: # File Line Location 0
/etc/httpd/modules/passenger/lib/phusion_passenger/utils.rb 675 in
lstat' 1
/etc/httpd/modules/passenger/lib/phusion_passenger/utils.rb 675 in
lower_privilege' 2
/etc/httpd/modules/passenger/lib/phusion_passenger/utils.rb 198 in
prepare_app_process' 3
/etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb
156 inblock in initialize_server' 4
/etc/httpd/modules/passenger/lib/phusion_passenger/utils.rb 563 in
report_app_init_status' 5
/etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb
154 ininitialize_server' 6
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb
204 in start_synchronously' 7
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb
180 instart' 8
/etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb
129 in start' 9
/etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb
253 inblock (2 levels) in spawn_rack_application' 10
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server_collection.rb
132 in lookup_or_add' 11
/etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb
246 inblock in spawn_rack_application' 12
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server_collection.rb
82 in block in synchronize' 13 prelude> 10:insynchronize' 14
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server_collection.rb
79 in synchronize' 15
/etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb
244 inspawn_rack_application' 16
/etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb
137 in spawn_application' 17
/etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb
275 inhandle_spawn_application' 18
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb
357 in server_main_loop' 19
/etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb
206 instart_synchronously' 20
/etc/httpd/modules/passenger/helper-scripts/passenger-spawn-server 99
in ` '
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