Docker: Ubuntu htop

• RUN

Previously we created a Docker image manually after we have installed htop and created a file manually in a Docker container. Let's do the same now using Dockerfile.

FROM ubuntu:23.04

RUN apt-get update
RUN apt-get install -y htop
RUN echo "Hello World" > welcome.txt

docker build -t mydocker .
docker run --rm -it mydocker