merchant landing: dual-currency intro + nginx :9015

configs/merchant-landing/nginx-landing.conf

@@ -0,0 +1,24 @@
+# Merchant landing — :9015 (behind Caddy — no port in Location)
+server {
+    listen 9015;
+    listen [::]:9015;
+    server_name taler.hacktivism.ch _;
+    root /var/www/merchant-landing;
+    index index.html;
+
+    absolute_redirect off;
+    port_in_redirect off;
+
+    location = / {
+        return 302 /intro/;
+    }
+    location = /intro {
+        return 302 /intro/;
+    }
+    location /intro/ {
+        alias /var/www/merchant-landing/;
+    }
+    location / {
+        try_files $uri $uri/ =404;
+    }
+}