How to Fix Docker Build Failure in NestJS

Nothing disrupts a coding session quite like an unexpected Docker Build Failure in NestJS. Here's how to diagnose and fix it.

Root Cause

Docker build failures in NestJS usually come from missing system dependencies, incorrect base images, or build steps that require files not yet copied into the container. The minimal container environment differs significantly from your local machine.

Step-by-Step Fix

The key is to separate build and production stages to keep the final image lean:

FROM node:20-alpine AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

FROM node:20-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY --from=build /app/dist ./dist
CMD ["node", "dist/main"]

Common Pitfall

Before diving into code changes, double-check your environment variables and NestJS version. Version mismatches between local and deployed environments are a frequent source of this error. While you're at it, check if your logging captures enough context around this error to speed up debugging next time.

Validate the Solution

Verify by triggering the same action that caused the original error. In NestJS, you can also enable verbose logging temporarily to confirm the fix is applied correctly. Once verified, remove or reduce the logging level to keep your logs clean in production.

Stay Ahead of Errors

To prevent this from recurring unnoticed, set up [Bugsly](https://bugsly.dev) for your NestJS project — it monitors errors and gives you actionable alerts.