# After installing Docker Desktop (Windows/macOS) or Docker Engine (Linux)
docker --version
docker run --rm hello-world
# If you see a welcome message, Docker works on your laptop.

docker pull <image>:<tag>          # download a build
docker run -d -p 8080:80 <image>   # start it in the background
docker ps                          # see what is running
docker logs <container-id>         # share logs with developers
docker stop <container-id>         # stop it when done

# Compare the current and new builds side by side
docker run -d --name app-old -p 8081:80 registry.example.com/portal:1.4.1
docker run -d --name app-new -p 8082:80 registry.example.com/portal:1.4.2
# open http://localhost:8081 and http://localhost:8082
docker stop app-old app-new && docker rm app-old app-new
# (image names are examples — use the ones your team provides)

Build Review Notes
Image tag reviewed: portal:1.4.2
Requirement IDs covered: REQ-21, REQ-22
Matches acceptance criteria?
  REQ-21: Yes
  REQ-22: Partly — export button missing on mobile view
Questions for product owner: ______________
Logs attached: docker logs app-new > review-log.txt

docker run -d --name ba-db -p 5432:5432 \
  -e POSTGRES_PASSWORD=practice123 \
  -v ba-data:/var/lib/postgresql/data postgres:16

# connect with any SQL client: host localhost, port 5432,
# user postgres, password practice123
# load a sample CSV with your SQL client's import feature

# compose.yaml — database + admin UI for data exploration
services:
  db:
    image: postgres:16
    environment:
      POSTGRES_PASSWORD: practice123
    ports: ["5432:5432"]
  adminer:
    image: adminer
    ports: ["8080:8080"]
# docker compose up -d   → open http://localhost:8080
# docker compose down    → stop everything

Request to the delivery team
Feature: ______________
Requirement IDs: ______________
Please share:
  ☐ Image name and tag
  ☐ Port to open
  ☐ Sample login or test data
  ☐ Any environment variables needed
Review deadline: ______

Local UAT Checklist
☐ Image tag noted
☐ Each acceptance criterion tested
☐ Screenshots for each requirement
☐ Logs saved for any error
☐ Feedback sent with tag, steps and expected vs actual
☐ Containers stopped and removed

Delivery terms explained simply
Image: packaged version of the software
Container: a running copy of that package
Tag: version label
Staging: final test environment before release
Pipeline: automated steps that build, test and release
Use these when explaining release status to business users.