Chef::Exceptions::FileNotFound: template[/var/www/html/index.html] - templates

Question

I am new to the chef I could not understand what is an issue. Following is my default script
apt_update 'Update the apt cache daily' do
frequency 86_400
action :periodic
end
package 'apache2'
service 'apache2' do
supports status: true
action [:enable, :start]
end
template '/var/www/html/index.html' do
source 'index.html.erb'
end
this is the error I am getting
[2020-04-25T12:57:00+00:00] FATAL: Stacktrace dumped to /home/vagrant/.chef/local-mode-cache/cache/chef-stacktrace.out
[2020-04-25T12:57:00+00:00] FATAL: Please provide the contents of the stacktrace.out file if you file a bug report
[2020-04-25T12:57:00+00:00] FATAL: Chef::Exceptions::FileNotFound: template[/var/www/html/index.html] (learn_chef_apache2::default line 18) had an error: Chef::Exceptions::FileNotFound: Cookbook 'learn_chef_apache2' (0.1.0) does not contain a file at any of these locations:
templates/host-vagrant.vm/index.html.erb
templates/ubuntu-18.04/index.html.erb
templates/ubuntu/index.html.erb
templates/default/index.html.erb
templates/index.html.erb
and this is my cookbooks tree
cookbooks
├── learn_chef_apache2
│   ├── Berksfile
│   ├── CHANGELOG.md
│   ├── chefignore
│   ├── LICENSE
│   ├── metadata.rb
│   ├── README.md
│   ├── recipes
│   │   └── default.rb
│   ├── spec
│   │   ├── spec_helper.rb
│   │   └── unit
│   │   └── recipes
│   │   └── default_spec.rb
│   └── test
│   └── integration
│   └── default
│   └── default_test.rb
├── learn_chef_appache2
│   └── templates
│   ├── default
│   └── index.html.erb
└── templates
└── index.html.erb
Can someone please help me what wrong I am doing and it will be great if you can share a link or explain it for my understanding.

Answer 1

what I did wrong was my template was created outside learn_chef_apache2 whereas it should be inside as follwing
cookbooks
└── learn_chef_apache2
├── Berksfile
├── CHANGELOG.md
├── chefignore
├── index.html.erb
├── LICENSE
├── metadata.rb
├── README.md
├── recipes
│   └── default.rb
├── spec
│   ├── spec_helper.rb
│   └── unit
│   └── recipes
│   └── default_spec.rb
├── templates
│   └── index.html.erb
└── test
└── integration
└── default
└── default_test.rb