add nginx checking

ansible/roles/lego/tasks/initial_cert.yaml

@@ -16,12 +16,14 @@
   service:
     name: nginx
     state: stopped
+  when: "'nginx' in ansible_facts.packages" # Checks if 'nginx' key exists in the gathered facts
 
 - name: Generate initial cert
   command:
     cmd: /usr/local/bin/lego -a --email="{{ letsencrypt_email }}" --domains="{{ inventory_hostname | default(cert_domain) }}" --key-type {{ cert_key_type | default('rsa4096') }} --http run
     chdir: /root
     creates: "/root/.lego/certificates/{{ inventory_hostname | default(cert_domain) }}.crt"
+  when: "'nginx' in ansible_facts.packages" # Checks if 'nginx' key exists in the gathered facts
 
 - name: Start nginx after generating initial lego cert
   service: