Docker Run multi Docker containers with compose file
In the previous post, I explained how to communicate with other Docker containers. If you haven't read the post yet, go ...
Docker 
Docker Communication with other Docker containers
When we want decide to use Docker container we probably have multiple Docker containers. In that case each container has...
Docker Bind host directory to Docker container for dev-env
Docker offers following 3 ways to store persistent data. bind mount: Host machine's folder/file is mounted into a contai...
Docker Docker volume
In the last post, I wrote how to run Node.js application in a docker container but it was Hello, World. application. So ...
Docker Start Docker from scratch
Docker is widely used but I haven't used it in my career. However, it is one of very useful softwares so it's time to le...
JavaScript/TypeScript Difference between for, while, forEach, for-in and for-of
A lot of languages support several ways for loop logic. Typescript supports following ways for example. whileforfor in f...
JavaScript/TypeScript async/await with Promise in TypeScript
Using promise makes the code much faster. This post explains the basic and advanced usage.
JavaScript/TypeScript How to write unit tests for a singleton class
Once a static field value changes in unit tests, the change applies to other tests because it's static. It's important to split it into two classes. One class has the main logic and the other stores the class to provide it as singleton.
Other techs Start Powershell with specified execution policy without changing default
How to start powershell I often starts powershell.exe from an explorer instead of command prompt because it looks better...
JavaScript/TypeScript Using spread operator for process.env
I faced strange behavior when I used spread operator for process.env. In my project, our main source is Typescript but w...