YOU can have GOOD Dockerfiles

Not sure about your Dockerfile? Confused? Overwhelmed? Get expert guidance for production-ready containers that are faster, smaller and more secure.

Review Your Dockerfile With Us

Ivan and Kyle team up to make your Dockerfiles better

Choosing an Optimal Node.js Base Image

Before

FROM node:22 AS build
WORKDIR /app
COPY . .

RUN npm ci
RUN npm run build

# Poor but common base image choice
FROM node:22 AS runtime
WORKDIR /app

COPY --from=build /app/.output .

ENV NODE_ENV=production
EXPOSE 3000

CMD ["node", "/app/.output"]

After

FROM node:22-slim AS build
WORKDIR /app
COPY . .

RUN npm ci
RUN npm run build

# A simple change with a huge impact
FROM node:22-slim AS runtime
WORKDIR /app

COPY --from=build /app/.output .

ENV NODE_ENV=production
EXPOSE 3000

CMD ["node", "/app/.output"]

Improvement

A single line change that leads to an immediate removal of 900+ CVEs and a 80% base image size reduction.

The Container Guys

Kyle Quest

linktr.ee/kcqon

Security and Containerization Expert
Created DockerSlim & Founded Slim.AI
On a mission to make containers smaller

Ivan Velichko

x.com/iximiuz

Software Engineer and Tech Storyteller
Creator and author of labs.iximiuz.com
Here to help you master Linux and Docker

Want Your Dockerfile Improved?

Send us your Dockerfile to analyze it for potential improvements in size, security, and build speed. The most challenging Dockerfiles will get an opportunity to be reviewed live.

How it works

One-off Dockerfile reviews are provided free of charge (assuming well-detailed submission).
For engagements larger than one-off reviews, the terms will be discussed via the email.
If your team needs a workshop on Docker or specifically on building good container images, you can request it in the description field.