How to Dockerize an App
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In this video, we dive deep into professional IT workflows to help you learn faster and code smarter. Whether you're a DevOps engineer, a SysAdmin, or a curious developer, our "No Filler" approach ensures you get the facts without the fluff.
Got an app that runs on your machine but breaks on everyone else's? This hands-on tutorial shows you how to package it into a Docker container — so it runs identically anywhere. We go from source code to a running container step by step: write a Dockerfile, build the image, run it, and apply the best practices that separate a toy container from a production-ready one.
You'll learn:
• The 3 moves: Dockerfile (recipe) → image (package) → container (running)
• How to write a Dockerfile line by line — FROM, WORKDIR, COPY, RUN, EXPOSE, CMD
• docker build and docker run, explained (tags and port mapping)
• Layer caching — why deps go before code (fast builds)
• .dockerignore, slim base images & multi-stage builds (small images)
• Running as a non-root user (security)
• The everyday Docker commands you'll actually use
⏱️ Chapters
00:00 What we're doing & why
01:15 The 3 moves: build, run, ship
02:15 Step 1: Start with your app
02:45 Step 2: Write the Dockerfile
04:00 Step 3: Build the image
05:15 Step 4: Run the container
05:30 Step 5: Layer caching
06:00 Step 6: .dockerignore
07:00 Step 7: Slim it down
07:30 Step 8: Don't run as root
08:00 Everyday commands & common mistakes
08:30 The mental model + what's next
🐳 Go deeper
Dockerizing is step one. The Dargslan Kubernetes Hardening course takes you from a container to a secure, production cluster — hands-on → dargslan.com
🐳 Docker & K8s How-To series
How to Dockerize an App (this one) · Docker Compose · Push to a registry · Deploy to Kubernetes · Health checks & secrets — and more
#Docker #Dockerfile #DevOps #Containers #Kubernetes #CloudNative #BackendDevelopment
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