How does nginx proxy_pass an API to Node?
PICTURE THIS: STACK VS QUEUE
Simple meaning
A location block matches /api and proxy_pass to the upstream Node port.
WHY — nginx instead of guessing?
Why interviewers care about nginx:
question about nginx.
trade-offs, and what you would actually do on a Full Stack project - not buzzwords.
Name the idea, why it exists, then one short example.
End with when you use it and one common pitfall.
STEPS — What happens step by step?
Before you speak the answer, walk the interviewer through these steps:
- 1A location block matches
/api and proxy_pass to the upstream Node port.
- 2You forward Host, X-Forwarded-For,
and X-Forwarded-Proto so Express sees the real client and scheme.
- 3Timeouts and body size
limits should match what the API allows.
- 4Give an example
One tiny concrete case you can say aloud.
- 5Common mistake
What juniors usually get wrong.
- 6Close
When you pick this over the alternative.
EXAMPLE — See it in action
Here's a short line you can speak, broken into clear beats:
Note: Adapt this scaffold to your own project — keep it under 60–90 seconds.
Key takeaway
A location block matches /api and proxy_pass to the upstream Node port. You forward Host, X-Forwarded-For, and X-Forwarded-Proto so Express sees the real client and scheme.