fix: configure PORT for Railway deployment health checks

Author: Bulletdev

Dockerfile.production

@@ -76,12 +76,12 @@ RUN mkdir -p /app/tmp/pids /app/tmp/cache /app/tmp/sockets /app/log && \
 # Switch to non-root user
 USER rails:rails
 
-# Expose port
+# Expose port (Railway sets PORT=8080 by default)
 EXPOSE 3000
 
-# Health check
+# Health check (uses PORT env variable to match runtime configuration)
 HEALTHCHECK --interval=30s --timeout=3s --start-period=40s --retries=3 \
-    CMD curl -f http://localhost:3000/up || exit 1
+    CMD curl -f http://localhost:${PORT:-3000}/up || exit 1
 
 # Entry point for database migration
 COPY --chown=rails:rails deploy/scripts/docker-entrypoint.sh /usr/local/bin/

railway.json

@@ -14,6 +14,7 @@
   "env": {
     "RAILS_ENV": "production",
     "RAILS_LOG_TO_STDOUT": "true",
-    "RAILS_SERVE_STATIC_FILES": "true"
+    "RAILS_SERVE_STATIC_FILES": "true",
+    "PORT": "8080"
   }
 }