Finished section1: installing docker

notes/1_installing_docker.md

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+# Installing Docker
+
+## Setting up Docker
+
+* Docker needs a Linux server to manage
+* Some people using Linux VM to run docker
+* Docker helps run this Linux VM as shown below
+
+![Docker manage Linux VM](imgs/docker_manage_LinuxVM.png)
+Where
+* "Program named Docker" is a client program
+* "Docker" including LinuxVM is server program
+
+Simplest running docker container: `docker run hello-world`
+
+## Docker Desktop
+
+As I'm working on Ubuntu, docker desktop (only for Windows and Mac) is no need. As docker is just another program on linux
+
+`docker info` tell's general information about the docker server program