helps when you add the file you moved to git

workers/lets_encrypt_worker.rb

@@ -0,0 +1,50 @@
+class LetsEncryptWorker
+  class NotAuthorizedYetError < StandardError; end
+  class VerificationTimeoutError < StandardError; end
+  include Sidekiq::Worker
+  sidekiq_options queue: :lets_encrypt_worker, retry: 100, backtrace: true
+
+  sidekiq_retry_in do |count|
+    180
+  end
+
+  def perform(site_id)
+    letsencrypt = Acme::Client.new(
+      private_key: OpenSSL::PKey::RSA.new(File.read($config['letsencrypt_key'])),
+      endpoint: $config['letsencrypt_endpoint']
+    )
+
+    site = Site[site_id]
+
+    return if site.domain.blank? || site.is_deleted || site.is_banned
+
+    auth = letsencrypt.authorize domain: site.domain
+
+    challenge = auth.http01
+
+    FileUtils.mkdir_p File.join(site.base_files_path, File.dirname(challenge.filename))
+    File.write File.join(site.base_files_path, challenge.filename), challenge.file_content
+
+    challenge.request_verification
+
+    sleep 1
+
+    attempts = 0
+
+    begin
+      raise VerificationTimeoutError if attempts == 5
+      raise NotAuthorizedYet if challenge.verify_status != 'valid'
+    rescue NotAuthorizedYet
+      sleep 5
+      attempts += 1
+      retry
+    end
+
+    csr = Acme::Client::CertificateRequest.new names: [site.domain, "www.#{site.domain}"]
+    certificate = letsencrypt.new_certificate csr
+    site.ssl_key = certificate.request.private_key.to_pem
+    site.ssl_cert = certificate.fullchain_to_pem
+    site.save_changes validate: false
+    FileUtils.rm_rf File.join(site.base_files_path, '.well-known')
+  end
+end