Short scenarios. Copy/paste commands. Minimal notes. Multi-stage builds (smaller images) Goal: Build artifacts in one stage, run with a minimal final image. # build as usual (Dockerfile contains multiple FROM stages) docker build -t myapp:prod . docker image inspect myapp:prod --format '{{.Size}}' Notes * Typical pattern: builder stage
Short scenarios. Copy/paste commands. Minimal notes. Start/stop a multi-service stack Goal: Bring up all services defined in docker-compose.yml. docker compose up -d docker compose ps # stop (keeps containers) docker compose stop # stop + remove containers + default network docker compose down Notes * down does not remove named volumes unless
Short scenarios. Copy/paste commands. Minimal notes. Use a named volume for persistent data Goal: Keep data even if the container is removed. docker volume create mydata docker run --rm -d \ --name db \ -e POSTGRES_PASSWORD=postgres \ -v mydata:/var/lib/postgresql/data \ postgres:16 Notes * Named volumes are managed
Short scenarios. Copy/paste commands. Minimal notes. Build an image from a Dockerfile Goal: Turn your app into a Docker image. docker build -t myapp:local . docker images | head Notes * -t sets name:tag. Use a clear local tag like myapp:local. Run with port mapping Goal: Expose a container
Short scenarios. Copy/paste commands. Minimal notes. Run a container Goal: Verify Docker works by running something simple. docker run --rm hello-world Notes * --rm removes the container automatically after it exits. Pull an image + list local images Goal: Download an image and confirm it exists locally. docker pull nginx:latest
Short scenarios. Copy/paste commands. Minimal notes. Interactive rebase to rewrite commits (drop/reorder/fixup) Goal: Clean up your branch history before merging to dev. git fetch origin git checkout feat/<feature-name> git rebase -i origin/dev # use: pick, reword, edit, squash, fixup, drop # update remote after rewrite
Short scenarios. Copy/paste commands. Minimal notes. Rebase your feature on dev and resolve conflicts Goal: Update your branch with latest dev while keeping history linear. git fetch origin git checkout feat/<feature-name> git rebase origin/dev # if conflicts: # edit conflicted files git add -A git rebase --continue
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Short scenarios. Copy/paste commands. Minimal notes. Stash work (pause changes, switch context) Goal: Temporarily set aside local changes without committing. git status git stash push -m "wip: <short note>" git status # bring it back git stash pop Notes * List stashes: git stash list * Apply without
Short scenarios. Copy/paste commands. Minimal notes. Start a feature branch from dev Goal: Create a new branch based on the latest dev. git checkout dev git pull --ff-only git checkout -b feature/<short-name> Notes * Use a consistent name: feature/login-timeout, feature/ui-header, etc. Push your new branch
Short scenarios. Copy/paste commands. Minimal notes. Clone the repo and verify you’re on main Goal: Get the code locally and confirm you’re on the default branch. git clone <REPO_URL> cd <REPO_FOLDER> git status git branch --show-current Notes * If you are not
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