bank landing: Open Graph preview image (GOA shop products)

configs/bank-landing/README.md

@@ -194,7 +194,8 @@ Landing root (nginx in bank container), typically under something like
 
 | File | Role |
 |------|------|
-| `index.html` | landing (wallet, shared withdraw, folds, stats) |
+| `index.html` | landing (wallet, shared withdraw, folds, stats) + Open Graph meta |
+| `og-goa-shop.png` | **link preview** image (1200×630) for chats / social (OG + Twitter) |
 | `shop-pay.css` / `shop-pay.js` | GOA shop popup + **QR_Taler** frame styles |
 | `qr-logo.svg` | center logo on QR_Taler frames |
 | `qrcode.min.js` | QR encode helper |
@@ -210,6 +211,8 @@ Landing root (nginx in bank container), typically under something like
 # landing assets
 podman cp configs/bank-landing/index.html \
   taler-hacktivism-bank:/var/www/bank-landing/index.html
+podman cp configs/bank-landing/og-goa-shop.png \
+  taler-hacktivism-bank:/var/www/bank-landing/og-goa-shop.png
 podman cp configs/bank-landing/shop-pay.js \
   taler-hacktivism-bank:/var/www/bank-landing/shop-pay.js
 # … shop-pay.css, qr-logo.svg, qrcode.min.js as needed

configs/bank-landing/index.html

@@ -4,6 +4,25 @@
   <meta charset="utf-8" />
   <meta name="viewport" content="width=device-width, initial-scale=1" />
   <title>GOA Exploration Bank</title>
+  <meta name="description" content="Withdraw GOA with one QR from the shared pool, try GOA shop samples, pay with GNU Taler — no IBAN." />
+  <link rel="canonical" href="https://bank.hacktivism.ch/intro/" />
+  <meta property="og:type" content="website" />
+  <meta property="og:site_name" content="hacktivism.ch · GOA" />
+  <meta property="og:locale" content="en_US" />
+  <meta property="og:title" content="GOA Exploration Bank" />
+  <meta property="og:description" content="Withdraw GOA with one QR, browse GOA shop samples, pay with GNU Taler." />
+  <meta property="og:url" content="https://bank.hacktivism.ch/intro/" />
+  <meta property="og:image" content="https://bank.hacktivism.ch/intro/og-goa-shop.png" />
+  <meta property="og:image:secure_url" content="https://bank.hacktivism.ch/intro/og-goa-shop.png" />
+  <meta property="og:image:type" content="image/png" />
+  <meta property="og:image:width" content="1200" />
+  <meta property="og:image:height" content="630" />
+  <meta property="og:image:alt" content="GOA shop product samples — pay with GNU Taler" />
+  <meta name="twitter:card" content="summary_large_image" />
+  <meta name="twitter:title" content="GOA Exploration Bank" />
+  <meta name="twitter:description" content="Withdraw GOA with one QR, browse GOA shop samples, pay with GNU Taler." />
+  <meta name="twitter:image" content="https://bank.hacktivism.ch/intro/og-goa-shop.png" />
+  <meta name="twitter:image:alt" content="GOA shop product samples — pay with GNU Taler" />
   <style>
     :root {
       --bg: #1a1410;