What is Dockerfile | How to create and build Dockerfile | Dockerfile Basic Commands PART 1

In this Session explained
1. What is Dockerfile
2. How to create Dockerfile
3. How to build image from Dockerfile
4. Basic Commands

Dockerfile :
A text file with instructions to build image
Automation of Docker Image Creation

FROM
RUN
CMD

Step 1: Create a text file named Dockerfile
Step 2: Add instructions in Dockerfile
Step 3: Build Dockerfile to create an image
Step 4: Run image to create a container