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@@ -35,11 +35,42 @@ cloud computing in own words and list examples for offerings, topologies and tec
 
 ![Exercise Tech Stack](/pics/2024-03-11-Blackboard.jpg)
 
+### Homework
+
+* Get a public GitHub, GitLab or Bitbucket account
+* Play around with GitHub codespaces and/or Gitpod
+  
 # 2023-March-18 Session canceled
 
 # 2023-March-25 Cloud-based IDEs Intro & Docker/Container
 
-### Homework
+### Content 
+* Why do we need Containers?
+* Challenges for (polyglot) distributed systems in traditional IT:
 
-* Get a public GitHub, GitLab or Bitbucket account
-* Play around with GitHub codespaces and/or Gitpod
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+  * Each environment has to be configured manually: Servers as well as local dev environments
+  * Configuration has to be as identical as possible: minor configuration drifts can lead to errors and the "it runs on my machine" problem
+  * Polyglot Server Environments are a huge challenge as for each programing language a separate configuration has to be managed on all systems.
+  * Changing Versions is tedious for local dev environment
+
+  ![image](https://github.com/maeddes/hse-24-summer/assets/22505258/63a76e4b-cd0e-4f9d-8e6e-cb7b364d4581)
+
+  * Whereas containerized Applications bring their own Environment and Configuration
+  * No need to preconfigure the local environment per programming language or application.
+  * Only the container engine is required to run all kinds of containers.
+    
+ ![image](https://github.com/maeddes/hse-24-summer/assets/22505258/35dfe922-1c43-46db-a419-4c602dd084dc)
+
+ * How does the container engine work?
+ * Layer-based setup of containers
+ * Container vs Container Image
+ * How to create a container from application to dockerfile to image to running container
+
+  ![image](https://github.com/maeddes/hse-24-summer/assets/22505258/bcad4374-da59-429a-8272-1b42642c888c)
+
+### Student Questions:
+* Do I have to set up, build, and run the dockerfile  for each container?
+* Can I run multiple applications inside a container?
+
+### Labs
+Exercises can be found [here](https://lecture.new.trainings.nvtc.io/basics/container/)