fix: IndeedHub port 7778, podman registries v2 format

- IndeedHub container port changed from 7777 to 7778 (7777 used by nostr-relay)
- Nginx proxy updated to route to 7778
- Backend config.rs port mapping updated
- Podman registries.conf switched to v2 format (fixes mixed v1/v2 error)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

image-recipe/configs/nginx-archipelago.conf

@@ -408,7 +408,7 @@ server {
         sub_filter '</head>' '<script src="/nostr-provider.js"></script></head>';
     }
     location /app/indeedhub/_next/ {
-        proxy_pass http://127.0.0.1:7777/_next/;
+        proxy_pass http://127.0.0.1:7778/_next/;
         proxy_http_version 1.1;
         proxy_set_header Host $host;
         proxy_cache_valid 200 30d;
@@ -416,7 +416,7 @@ server {
     }
     # IndeeHub WebSocket proxy
     location /app/indeedhub/ws/ {
-        proxy_pass http://127.0.0.1:7777/ws/;
+        proxy_pass http://127.0.0.1:7778/ws/;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
@@ -425,7 +425,7 @@ server {
         proxy_read_timeout 86400s;
     }
     location /app/indeedhub/ {
-        proxy_pass http://127.0.0.1:7777/;
+        proxy_pass http://127.0.0.1:7778/;
         proxy_http_version 1.1;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;