Add tags for Galaxy (#42)

* Add tags for Galaxy

* Set build_ignore.

galaxy.yml

@@ -7,8 +7,24 @@ authors:
 description: null
 license: GPL-3.0-or-later
 license_file: COPYING
-tags: null
+tags:
+  - acme
+  - certificate
+  - community
+  - crl
+  - cryptography
+  - csr
+  - dhparam
+  - Entrust
+  - Let's Encrypt
+  - luks
+  - openssl
+  - openssh
+  - pkcs12
 repository: https://github.com/ansible-collections/community.crypto
 documentation: https://github.com/ansible-collection-migration/community.crypto/tree/master/docs
 homepage: https://github.com/ansible-collections/community.crypto
 issues: https://github.com/ansible-collections/community.crypto/issues
+build_ignore:
+  - 'community-crypto-*.tar.gz'
+  - .gitignore