Set site description

book/source/conf.py

@@ -20,6 +20,7 @@ version = "0.1"
 suppress_warnings = [
     'epub.unknown_project_files',
 ]
+description = 'The essential OpenPGP guide for application developers. Learn the OpenPGP standard for cryptographic operations and how to implement it in your projects. Gain insights into digital signatures, key management, certificates, and more. Version agnostic.'
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
@@ -54,11 +55,19 @@ myst_enable_extensions = [
     "deflist",
 ]
 
+# https://myst-parser.readthedocs.io/en/latest/configuration.html#setting-html-metadata
+myst_html_meta = {
+    "description lang=en": description,
+    "keywords": "openpgp, cryptographic operations, data encryption, digital signatures, key management, identity verification, secure communication, pgp, cryptographic protocols, public key encryption, openpgp v4, openpgp v6, openpgp implementation",
+    "property=og:locale":  "en_US"
+}
+
 # -- Options for EPUB output -------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-epub-output
 
 epub_copyright = f'{date.today().year}, {author} ({upstream_url}), CC-BY-SA-4.0'
 epub_cover = ('_static/epub/img/cover.png', 'cover.j2')
+epub_description = description
 epub_css_files = [
     'epub/css/custom.css'
 ]
@@ -93,3 +102,9 @@ html_theme_options = {
 # https://github.com/wpilibsuite/sphinxext-opengraph#simple-config
 ogp_site_url = 'https://openpgp.dev/book/'
 ogp_image = '_static/html/img/logo.png'
+ogp_type = 'book'
+
+ogp_custom_meta_tags = [
+    f'<meta property="og:description" content="{description}" />',
+]
+