Add hero image alts (#3898)

* Add hero image alts

* Translations

* Missed one

* Missing translations

* Add to ebook

Author: tunetheweb

src/content/en/2019/accessibility.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: Accessibility
 description: Accessibility chapter of the 2019 Web Almanac covering ease of reading, media, ease of navigation, and compatibility with assistive technologies.
+hero_alt: Hero image of a robot with a blue, human accessibility icon on its front scanning a web page, while Web Almanac characters check some labels.
 authors: [nektarios-paisios, foxdavidj, kleinab]
 reviewers: [ljme]
 analysts: [dougsillars, rviscomi, foxdavidj]

src/content/en/2019/caching.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: Caching
 description: Caching chapter of the 2019 Web Almanac covering cache-control, expires, TTLs, validitaty, vary, set-cookies, AppCache, Service Workers and opportunities.
+hero_alt: Hero image of Web Almanac charactes and resources in parking slots in a car park with parking meters in from of them. The middle spot is labelled 304.
 authors: [paulcalvano]
 reviewers: [foxdavidj, bkardell]
 analysts: [paulcalvano, foxdavidj]

src/content/en/2019/cdn.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: CDN
 description: CDN chapter of the 2019 Web Almanac covering CDN adoption and usage, RTT and TLS management, HTTP/2 adoption, caching and common library and content CDNs.
+hero_alt: Hero image of Web Almanac charactes extending a plug from a cloud into a web page.
 authors: [andydavies, colinbendell]
 reviewers: [yoavweiss, paulcalvano, pmeenan, enygren]
 analysts: [raghuramakrishnan71, rviscomi]

src/content/en/2019/cms.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: CMS
 description: CMS chapter of the 2019 Web Almanac covering CMS adoption, how CMS suites are built, User experience of CMS powered websites, and CMS innovation.
+hero_alt: Hero image of Web Almanac charactes on a type writer writing a web page.
 authors: [ernee, amedina]
 reviewers: [sirjonathan]
 analysts: [rviscomi]

src/content/en/2019/compression.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: Compression
 description: Compression chapter of the 2019 Web Almanac covering HTTP compression, algorithms, content types, 1st party and 3rd party compression and opportunities.
+hero_alt: Hero image of Web Almanac charactes using a ray gun to shrink an HTML page to make it much smaller.
 authors: [paulcalvano]
 reviewers: [foxdavidj, yoavweiss]
 analysts: [paulcalvano]

src/content/en/2019/css.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: CSS
 description: CSS chapter of the 2019 Web Almanac covering color, units, selectors, layout, typography and fonts, spacing, decoration, animation, and media queries.
+hero_alt: Hero image of almanac chracters measuring and painting a web page.
 authors: [una, argyleink]
 reviewers: [meyerweb, huijing]
 analysts: [rviscomi]

src/content/en/2019/ecommerce.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: Ecommerce
 description: Ecommerce chapter of the 2019 Web Almanac covering ecommerce platforms, payloads, images, third-parties, performance, SEO, and PWAs.
+hero_alt: Hero image of a Web Almanac character at a super market checkout loading items from a shopping basket onto the conveyor belt while another character payes with a credit card.
 authors: [samdutton, alankent]
 reviewers: [voltek62]
 analysts: [rviscomi]

src/content/en/2019/fonts.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: Fonts
 description: Fonts chapter of the 2019 Web Almanac covering where fonts are loaded from, font formats, font loading performance, variable fonts and color fonts.
+hero_alt: Hero image of Web Almanac chracters on an assembly line preparing various F letters in various styles and shapes.
 authors: [zachleat]
 reviewers: [logicalphase, AymenLoukil]
 analysts: [tjmonsi, rviscomi]

src/content/en/2019/http.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: HTTP/2
 description: HTTP/2 chapter of the 2019 Web Almanac covering adoption and impact of HTTP/2, HTTP/2 Push, HTTP/2 Issues, and HTTP/3.
+hero_alt: Hero image of Web Almanac chracters driving vehicles in various lanes carrying script and images resources.
 authors: [tunetheweb]
 reviewers: [bagder, rmarx, dotjs]
 analysts: [paulcalvano]

src/content/en/2019/javascript.md

@@ -2,6 +2,7 @@
 #See https://github.com/HTTPArchive/almanac.httparchive.org/wiki/Authors'-Guide#metadata-to-add-at-the-top-of-your-chapters
 title: JavaScript
 description: JavaScript chapter of the 2019 Web Almanac covering how much JavaScript we use on the web, compression, libraries and frameworks, loading, and source maps.
+hero_alt: Hero image of the Web Almanac chracters cycling to power a website.
 authors: [housseindjirdeh]
 reviewers: [foxdavidj, paulcalvano, mathiasbynens, rviscomi]
 analysts: [rviscomi]