10 Docker Tricks Every Developer Should Know in 2026 | Docker Tutorial

Your Docker image is 1.2 GB. Your senior's is 14 MB. Same app, same code — different Docker knowledge. These 10 tricks are all built into Docker. No paid tools, no plugins, no extensions. Just the CLI and Dockerfile you already have, used the way senior engineers actually use them. Smaller images, faster builds, safer secrets, cleaner debugging. ⏱ CHAPTERS 00:00 The 1.2 GB vs 14 MB problem 00:27 Intro — 10 tricks, all built-in 00:43 #1 Multi-stage builds (90% smaller images) 01:35 #2 BuildKit cache mounts (10s rebuilds) 02:27 #3 .dockerignore (the forgotten speedup) 03:20 #4 Distroless & scratch base images 04:10 #5 HEALTHCHECK (real readiness signals) 04:58 #6 Compose profiles (one file, every env) 05:48 #7 Compose watch (hot reload done right) 06:34 #8 BuildKit secrets (stop leaking tokens) 07:26 #9 docker system prune -af --volumes 08:15 #10 docker inspect | jq (glass-box debugging) 09:12 Payoff — use the tool you already have 09:41 Subscribe for part 2 🔗 Follow for more dev workflows that actually move the needle. Drop "DOCKER" in the comments if you want a part 2 — Kubernetes patterns, image scanning, and deploy tricks. #docker #devops #backend #softwareengineering #programming #dockerfile #containers #kubernetes