Updated ReadMe

Author: dporkka

README.md

@@ -1 +1,82 @@
-# docker-101
+# How to clone a github repo into docker
+
+## Step 1: Create a Dockerfile
+
+A Dockerfile is a script that contains instructions to build a Docker image. Here's a basic example:
+
+`# Use a base image
+FROM ubuntu:latest
+
+# Install necessary packages
+RUN apt-get update && apt-get install -y \
+    git \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set the working directory
+WORKDIR /app
+
+# Clone the GitHub repository
+RUN git clone https://github.com/username/repository.git
+
+# Set the working directory to the cloned repository
+WORKDIR /app/repository
+
+# Define the command to run when the container starts
+CMD ["bash"]`
+
+## Step 2: Build the Docker Image
+
+Navigate to the directory containing the Dockerfile and build the Docker image using the docker build command. Replace my-git-clone with a name for your Docker image.
+
+`docker build -t my-git-clone .`
+
+## Step 3: Run the Docker Container
+
+Once the Docker image is built, you can run a container from this image using the docker run command:
+
+`docker run -it my-git-clone`
+
+This command runs the container in interactive mode and starts a bash session.
+
+## Example Dockerfile Explained
+
+-   **FROM ubuntu**: Uses the latest Ubuntu base image.
+-   **RUN apt-get update && apt-get install -y git**: Updates the package list and installs Git.
+-   **WORKDIR /app**: Sets the working directory inside the container.
+-   **RUN git clone <https://github.com/username/repository.git>**: Clones the specified GitHub repository into the working directory.
+-   **WORKDIR /app/repository**: Sets the working directory to the cloned repository.
+-   **CMD ["bash"]**: Starts a bash session when the container runs.
+
+## Customizing the Dockerfile
+
+You can customize the Dockerfile according to your needs, such as specifying a particular branch or commit to clone, installing additional dependencies, or running specific commands after cloning the repository.
+
+## Example with Specific Branch
+
+If you want to clone a specific branch, you can modify the `git clone` command in the Dockerfile:
+
+`RUN git clone --branch branch-name https://github.com/username/repository.git`
+
+## Full Example
+
+Here's a complete example Dockerfile for cloning a specific branch and installing additional dependencies:
+
+`FROM ubuntu:latest
+
+RUN apt-get update && apt-get install -y\
+    git\
+    python3\
+    python3-pip\
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+RUN git clone --branch branch-name https://github.com/username/repository.git
+
+WORKDIR /app/repository
+
+RUN pip3 install -r requirements.txt
+
+CMD ["bash"]`
+
+By following these steps, you can clone a GitHub repository into a Docker container, customize the environment, and run any necessary commands.