Learning Dockerfile for Beginners

This project contains a simple and practical example of a Dockerfile to help beginners learn how to use Docker.

Prerequisites

• Docker installed on your system
• Basic knowledge of the Linux command line

Here's what each line does

• FROM ruby:2.7-alpine: Use the official Ruby 2.7 image as our base image. We're using the Alpine version to keep the image small.

• WORKDIR /app: Set the working directory in the container to /app.

• COPY Gemfile Gemfile.lock ./: Copy the Gemfile and Gemfile.lock files from the current directory to the container.

• RUN bundle install: Install the project dependencies using Bundler.

• COPY . .: Copy the rest of the application code to the container.

• CMD ["ruby", "app.rb"]: Set the command to start the application.

Usage

1. Clone the repository:

git clone https://github.com/devopshobbies/docker-templates.git

2. Build the Docker image:

cd docker-templates
docker build -t hello-ruby .

3. Run the Docker container:

docker run -it --rm hello-ruby