refactor: move dns-fix.js to /opt and apply globally via NODE_OPTIONS in Dockerfile

Dockerfile

@@ -6,7 +6,8 @@ ENV DEBIAN_FRONTEND=noninteractive \
     N8N_PORT=5678 \
     HF_HUB_DISABLE_PROGRESS_BARS=1 \
     PYTHONUNBUFFERED=1 \
-    PIP_ROOT_USER_ACTION=ignore
+    PIP_ROOT_USER_ACTION=ignore \
+    NODE_OPTIONS="--dns-result-order=ipv4first --require /opt/dns-fix.js"
 
 RUN apt-get update && apt-get install -y -q --no-install-recommends \
     ca-certificates \
@@ -29,7 +30,7 @@ RUN mkdir -p /home/node/app /home/node/.n8n && \
 WORKDIR /home/node/app
 
 COPY --chown=node:node health-server.js /home/node/app/health-server.js
-COPY --chown=node:node dns-fix.js /home/node/app/dns-fix.js
+COPY --chown=node:node dns-fix.js /opt/dns-fix.js
 COPY --chown=node:node n8n-sync.py /home/node/app/n8n-sync.py
 COPY --chown=node:node setup-uptimerobot.sh /home/node/app/setup-uptimerobot.sh
 COPY --chown=node:node start.sh /home/node/app/start.sh

start.sh

@@ -35,8 +35,7 @@ export N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS="${N8N_ENFORCE_SETTINGS_FILE_PERMIS
 export GENERIC_TIMEZONE="${GENERIC_TIMEZONE:-${TZ:-UTC}}"
 export TZ="${TZ:-$GENERIC_TIMEZONE}"
 
-# Force IPv4 resolution and apply custom DNS fallback for HF Spaces
-export NODE_OPTIONS="--dns-result-order=ipv4first --require /home/node/app/dns-fix.js"
+
 
 # Disable noisy or unnecessary services
 export N8N_PYTHON_NODES_ENABLED="${N8N_PYTHON_NODES_ENABLED:-false}"