Add October and November 2025 events; update image fallback for event cards

Author: jetzlstorfer

_data/events.yml

@@ -631,4 +631,25 @@
       speaker: "Markus Adelsberger & Georg Mayrhauser"
       image: "https://media.licdn.com/dms/image/v2/C4E03AQHKADs1R6XXuw/profile-displayphoto-shrink_800_800/profile-displayphoto-shrink_800_800/0/1653720929705?e=1757548800&v=beta&t=vzgx8X9dsz8AztA1wzVPkKW8yPKhK_XzWmyvGHqdR9Q"
     - title: "Open Mic - Share your Cloud Native Journey"
-      speaker: "the community"
+      speaker: "the community"
+
+- id: 43
+  title: "October 2025 edition"
+  date: "2025-10-28"
+  host: "Loupe"
+  event_link: ""
+  registrations: ""
+  participants: ""
+  talks:
+    - title: "Talk title to be announced soon"
+      speaker: "Matthias Steinbauer"
+
+- id: 44
+  title: "November 2025 edition"
+  date: "2025-11-25"
+  host: "MIC"
+  event_link: ""
+  registrations: ""
+  participants: ""
+  talks:
+    

_includes/upcoming-events.html

@@ -23,7 +23,7 @@
       <img src="https://raw.githubusercontent.com/CloudNativeLinz/go-image-generator/main/artifacts/{{ event.id }}.jpg" 
            alt="{{ event.title }}" 
            loading="lazy"
-           onerror="this.src='https://via.placeholder.com/400x200/1f2937/ffffff?text=Event+{{ event.id }}'"
+           onerror="this.src='https://raw.githubusercontent.com/CloudNativeLinz/go-image-generator/refs/heads/main/assets/backgrounds/meetup-background.jpg'"
       />
       <div class="event-overlay">
         <div class="event-date">

_pages/events.md

@@ -19,7 +19,7 @@ permalink: events/
       <img src="https://raw.githubusercontent.com/CloudNativeLinz/go-image-generator/main/artifacts/{{ event.id }}.jpg" 
            alt="{{ event.title }}" 
            loading="lazy"
-           onerror="this.src='https://via.placeholder.com/400x200/1f2937/ffffff?text=Event+{{ event.id }}'"
+           onerror="this.src='https://raw.githubusercontent.com/CloudNativeLinz/go-image-generator/refs/heads/main/assets/backgrounds/meetup-background.jpg'"
       />
       <div class="event-overlay">
         <div class="event-date">