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Dockerfile
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Dockerfile
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# Purpose: This line specifies the base image for the Docker container.
# In this case, it uses the python:3.8-alpine image.
# Details:
# python: This indicates that we want a Python image.
# 3.8: Specifies the version of Python to use.
# alpine: This is a lightweight version of the Python image based on Alpine Linux,
# which is known for its small size and simplicity.
FROM python:3.8-alpine
#Purpose: This line copies all the files from the current directory on your host machine to the /app directory inside the Docker container.
#Details:
#Refers to the current directory on the host.
#/app: The target directory in the Docker container where the files will be copied.
COPY . /app
# Purpose: This line sets the working directory inside the Docker container to /app.
# Details:
# Any subsequent RUN, CMD, ENTRYPOINT, COPY, and ADD instructions will be executed relative to this path.
# It also sets the default location for any relative paths used in commands.
WORKDIR /app
# Purpose: This line sets the working directory inside the Docker container to /app.
# Details:
# Any subsequent RUN, CMD, ENTRYPOINT, COPY, and ADD instructions will be executed relative to this path.
# It also sets the default location for any relative paths used in commands.
RUN pip install -r requirements.txt
# Purpose: This line specifies the command to run when the container starts.
# Details:
# CMD: Used to provide defaults for an executing container.
# python /app/main.py: Runs the main.py script located in the /app directory using Python.
CMD python /app/main.py
# Step-by-Step Process
# Base Image: Start with a lightweight Python 3.8 image based on Alpine Linux.
# Copy Application Code: Copy all your application code from the host machine to the /app directory in the container.
# Set Working Directory: Set the working directory to /app so all subsequent commands are run from this location.
# Install Dependencies: Use pip to install any Python packages listed in requirements.txt.
# Run the Application: Specify the command to run your application, which in this case is python /app/main.py.