Fix Karakeep Chrome connectivity on PD

documents/docker-compose.yaml

@@ -73,7 +73,9 @@ services:
       NEXTAUTH_SECRET: ${KARAKEEP_NEXTAUTH_SECRET}
       MEILI_ADDR: http://karakeep-meilisearch:7700
       MEILI_MASTER_KEY: ${KARAKEEP_MEILI_MASTER_KEY}
-      BROWSER_WEB_URL: http://karakeep-chrome:9222
+      # Chromium remote debugging now rejects non-local hostname Host headers here,
+      # so Karakeep must reach Chrome over a stable bridge IP rather than service DNS.
+      BROWSER_WEB_URL: http://172.16.16.3:9222
       DISABLE_SIGNUPS: ${KARAKEEP_DISABLE_SIGNUPS}
       DB_WAL_MODE: ${KARAKEEP_DB_WAL_MODE}
       LOG_LEVEL: ${KARAKEEP_LOG_LEVEL}
@@ -102,7 +104,8 @@ services:
       - --remote-debugging-port=9222
       - --hide-scrollbars
     networks:
-      - karakeep
+      karakeep:
+        ipv4_address: 172.16.16.3
 
   karakeep-meilisearch:
     image: getmeili/meilisearch:v1.41.0
@@ -126,3 +129,10 @@ networks:
     external: true
   karakeep:
     name: documents_karakeep
+    # Pin the subnet so karakeep-chrome keeps the IP Karakeep uses for DevTools.
+    ipam:
+      config:
+        - subnet: 172.16.16.0/24
+          gateway: 172.16.16.1
+        - subnet: fdd0:0:0:10::/64
+          gateway: fdd0:0:0:10::1