feat(docs): Google Analytics tags per every page (#921)

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `&&=`, `||=`, `>>=` and `<<=` augmented assignment operators: PR [#853](https://github.com/tact-lang/tact/pull/853)
 - New CSpell dictionaries: TVM instructions and adjusted list of Fift words: PR [#881](https://github.com/tact-lang/tact/pull/881)
 - Docs: the `description` property to the frontmatter of the each page for better SEO: PR [#916](https://github.com/tact-lang/tact/pull/916)
+- Docs: Google Analytics tags per every page: PR [#921](https://github.com/tact-lang/tact/pull/921)
 
 ### Changed
 

docs/astro.config.mjs

@@ -56,6 +56,18 @@ export default defineConfig({
 				replacesTitle: true,
 			},
 			// 'head' is auto-populated with SEO-friendly contents based on the page frontmatters
+			head: [
+				{
+					// Google tag (gtag.js)
+					tag: "script",
+					attrs: { async: true, src: 'https://www.googletagmanager.com/gtag/js?id=G-ZJ3GZHJ0Z5' }
+				},
+				{
+					// Per-page Google tag setup
+					tag: "script",
+					content: "window.dataLayer=window.dataLayer||[];function gtag(){dataLayer.push(arguments)}gtag('js',new Date());gtag('config','G-ZJ3GZHJ0Z5');",
+				}
+			],
 			social: {
 				github: 'https://github.com/tact-lang/tact',
 				telegram: 'https://t.me/tactlang',