Dockerfile Expose Example New! < HOT – 2025 >

HEALTHCHECK --interval=30s --timeout=3s CMD curl --fail http://localhost:80 || exit 1

# Image EXPOSEs 3000, but we can run on different port internally docker run -p 8080:8080 -e PORT=8080 myapp dockerfile expose example

To make the EXPOSE port accessible, you must publish it during runtime. dockerfile expose example

# ✅ GOOD: Minimal exposure FROM node:18-alpine EXPOSE 3000 # Only what's necessary dockerfile expose example

FROM nginx:alpine

COPY . .