# Course 31 - Dive Into Docker | Episode 9: Orchestrating Multi-Container Web Applications with Docker Compose Page: https://stenobird.com/podcast/cybercode-academy-7578615/course-31-dive-into-docker-episode-9-orchestrating-multi-container-web-applications-with-docker-compose Text version: https://stenobird.com/podcast/cybercode-academy-7578615/course-31-dive-into-docker-episode-9-orchestrating-multi-container-web-applications-with-docker-compose.md Podcast: [CyberCode Academy](https://stenobird.com/podcast/cybercode-academy-7578615) Published: 2026-04-28T06:00:02+00:00 Episode link: https://www.spreaker.com/episode/course-31-dive-into-docker-episode-9-orchestrating-multi-container-web-applications-with-docker-compose--71307454 Audio file: https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/71307454/orchestrate_your_local_stack_with_compose.mp3 Processing state: not_requested JSON: https://stenobird.com/v1/public/podcasts/cybercode-academy-7578615/episodes/course-31-dive-into-docker-episode-9-orchestrating-multi-container-web-applications-with-docker-compose Duration seconds: 1358 ## Resource In this lesson, you’ll learn about: Docker Compose, multi-container apps, and service orchestration1. What is Docker Compose? Docker Compose is a tool used to: Define Run Manage multi-container applications using a single command πŸ‘‰ Instead of long docker run commands, you describe everything in one file2. The docker-compose.yml File Core configuration file written in YAML Uses version 3 syntax Example structure:version: "3" services: web: build: . redis: image: redis Defines: Services (containers) Networks Volumes 3. Defining Services Each service represents a container Example: Web app (custom build) Redis (prebuilt image) πŸ”Ή Build vs Image build: β†’ build from local Dockerfile image: β†’ pull from registry (e.g., Docker Hub) web: build: . redis: image: redis 4. Port Mappingports: - "5000:5000" Format:host_port : container_port πŸ‘‰ Allows access from your browser (localhost)5. Volumes (Data Management)πŸ”Ή Host-Mounted Volumevolumes: - .:/app Syncs local files with container Ideal for development πŸ”Ή Named Volumevolumes: - redis-data:/data volumes: redis-data: Persistent storage Managed by Docker 6. Managing Service Dependenciesdepends_on: - redis Ensures: Redis starts before the web app πŸ‘‰ Important for backend-dependent services7. Environment Variables with .env Store sensitive or dynamic values: COMPOSE_PROJECT_NAME=myapp Benefits: Cleaner config Avoid hardcoding Easy to manage across environments πŸ”Ή COMPOSE_PROJECT_NAME Defines a custom project name Prevents conflicts between projects πŸ‘‰ Useful when running multiple apps on the same machine8. Running Everything with One Commanddocker-compose up Builds images Creates containers Starts all services 9. Why Docker Compose Matters Simplifies complex setups Reduces human error Makes projects: Reproducible Shareable Scalable Key Takea… ## Actions - request_transcript: `POST https://stenobird.com/v1/public/podcasts/cybercode-academy-7578615/episodes/course-31-dive-into-docker-episode-9-orchestrating-multi-container-web-applications-with-docker-compose/transcription-requests` β€” Idempotently request low-priority transcript generation for this episode. - read_markdown: `GET https://stenobird.com/podcast/cybercode-academy-7578615/course-31-dive-into-docker-episode-9-orchestrating-multi-container-web-applications-with-docker-compose.md` β€” Read the agent-friendly Markdown representation of this episode resource. A page view does not enqueue transcription. Agents should invoke `request_transcript` explicitly when they need this episode processed. ## Transcript Full transcripts are not published on public pages unless there is a clear rights basis.