{"podcast":{"title":"CyberCode Academy","slug":"cybercode-academy-7578615","podcast_index_feed_id":7578615,"rss_url":"https://www.spreaker.com/show/6790974/episodes/feed","website_url":"https://www.spreaker.com/podcast/cybercode-academy--6790974","image_url":"https://d3wo5wojvuv7l.cloudfront.net/t_rss_itunes_square_1400/images.spreaker.com/original/5f51ccc7b22fdba95149ffa6346f1533.jpg","author":"CyberCode Academy","episode_count":297,"summary":"Welcome to CyberCode Academy — your audio classroom for Programming and Cybersecurity. 🎧 Each course is divided into a series of short, focused episodes that take you from beginner to advanced level — one lesson at a time. From Python and web development to ethical hacking and digital defense, our content transforms complex concepts into simple, engaging audio learning. Study anywhere, anytime — and level up your skills with CyberCode Academy. 🚀 Learn. Code. Secure. You can listen and download our episodes for free on more than 10 different platforms: https://linktr.ee/cybercode_academy","last_synced_at":"2026-07-13T14:17:20.596630+00:00","page_url":"https://stenobird.com/podcast/cybercode-academy-7578615"},"episode":{"title":"Course 31 - Dive Into Docker | Episode 6: A Hands-On Guide to Dockerizing Web Applications","slug":"course-31-dive-into-docker-episode-6-a-hands-on-guide-to-dockerizing-web-applications","published_at":"2026-04-25T06:00:02+00:00","page_url":"https://stenobird.com/podcast/cybercode-academy-7578615/course-31-dive-into-docker-episode-6-a-hands-on-guide-to-dockerizing-web-applications","show_page_url":"https://stenobird.com/podcast/cybercode-academy-7578615","url":"https://www.spreaker.com/episode/course-31-dive-into-docker-episode-6-a-hands-on-guide-to-dockerizing-web-applications--71307442","audio_url":"https://dts.podtrac.com/redirect.mp3/api.spreaker.com/download/episode/71307442/faster_docker_builds_with_layer_caching.mp3","summary":"In this lesson, you’ll learn about: dockerizing a web app, writing Dockerfiles, and optimizing builds1. The Application Architecture (Real-World Example) This lab uses a simple microservices setup: Flask web application (frontend/API) Redis (backend datastore) Key idea: Each service runs in its own container They communicate over a Docker network 👉 This mirrors real production systems (microservices architecture)2. Writing a Dockerfile from ScratchA Dockerfile is the blueprint for building an image in Docker.🧱 FROM — Base ImageFROM python:2.7-alpine Uses an official image Alpine = very small size → faster builds & less storage ⚙️ RUN — Execute CommandsRUN mkdir /app Runs shell commands inside the image Typically used for: Installing dependencies Preparing the environment 📁 WORKDIR — Set Working DirectoryWORKDIR /app Defines where commands will run Avoids hardcoding full paths everywhere 📦 COPY — Add Files to ImageCOPY . . Copies your application code into the container Includes: Source code Requirements file 3. Build Optimization (Layer Caching) Docker builds images in layers Order of instructions matters a lot ✅ Optimized Approach:COPY requirements.txt . RUN pip install -r requirements.txt COPY . . Why? Dependencies don’t change often Docker caches this layer Rebuilds become much faster 4. Metadata with LABELLABEL maintainer=\"you@example.com\" Adds useful metadata: Author Version Description 👉 Helpful for team environments and production tracking5. Running the Application with CMDCMD [\"python\", \"app.py\"] Defines the default command when the container starts In this case: Launches the Flask app on port 5000 6. How Everything Works Together Build the image:docker build -t myapp . Run the container:docker run -p 5000:5000 myapp Access app: Open browser → localhost:500…","meta_description":"In this lesson, you’ll learn about: dockerizing a web app, writing Dockerfiles, and optimizing builds1. The Application Architecture (Real-World Example)…","key_points":[],"chapters":[],"topics":[],"duration_seconds":882,"processing_state":"not_requested","actions":[{"name":"request_transcript","method":"POST","url":"https://stenobird.com/v1/public/podcasts/cybercode-academy-7578615/episodes/course-31-dive-into-docker-episode-6-a-hands-on-guide-to-dockerizing-web-applications/transcription-requests","description":"Idempotently request low-priority transcript generation for this episode."},{"name":"read_markdown","method":"GET","url":"https://stenobird.com/podcast/cybercode-academy-7578615/course-31-dive-into-docker-episode-6-a-hands-on-guide-to-dockerizing-web-applications.md","description":"Read the agent-friendly Markdown representation of this episode resource."}]}}