fix: add HOST=0.0.0.0 env to Dockerfile for probot v14 compatibility (#948)

Agent-Logs-Url: https://github.com/github/safe-settings/sessions/6a4f5799-ea1f-4900-a659-b492dbdf5cfc

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: decyjphr <57544838+decyjphr@users.noreply.github.com>

Author: Copilot

Dockerfile

@@ -1,6 +1,7 @@
 FROM node:22-alpine
 WORKDIR /opt/safe-settings
 ENV NODE_ENV production
+ENV HOST=0.0.0.0
 ## Set the Labels
 LABEL version="1.0" \
       description="Probot app which is a modified version of Settings Probot GitHub App" \