first commit

Dockerfile.bash

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+# Use the official Ubuntu image as the base image
+FROM ubuntu:latest
+
+# Set the working directory
+WORKDIR /usr/src/app
+
+# Copy the hello_world.sh script into the container
+COPY hello_world.sh .
+
+# Make the script executable
+RUN chmod +x hello_world.sh
+
+# Run the script
+CMD ["./hello_world.sh"]

Dockerfile.python

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+# Use the official Python image as the base image
+FROM python:3.9.19
+
+# Set the working directory
+WORKDIR /usr/src/app
+
+# Copy the hello_world.py script into the container
+COPY hello_world.py .
+
+# Run the script
+CMD ["python3", "hello_world.py"]

Dockerfile.python-alpine

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+# Use the official Python image as the base image
+FROM alpine:latest
+
+# Install python
+RUN apk add --no-cache python3
+
+# Set the working directory
+WORKDIR /usr/src/app
+
+# Copy the hello_world.py script into the container
+COPY hello_world-alpine.py .
+
+# Run the script
+CMD ["python3", "hello_world-alpine.py"]

hello_world-alpine.py

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+import time
+
+# Total duration in seconds (10 minutes * 60 seconds)
+duration = 10 * 60
+# Interval between messages in seconds
+interval = 5
+# End time calculation
+end_time = time.time() + duration
+
+# Loop until the current time is less than the end time
+while time.time() < end_time:
+    print("Hello world - from Python in Alpine!")
+    time.sleep(interval)

hello_world.py

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+import time
+
+# Total duration in seconds (10 minutes * 60 seconds)
+duration = 10 * 60
+# Interval between messages in seconds
+interval = 5
+# End time calculation
+end_time = time.time() + duration
+
+# Loop until the current time is less than the end time
+while time.time() < end_time:
+    print("Hello world - from Python!")
+    time.sleep(interval)

hello_world.sh

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+#!/bin/bash
+
+# Total duration in seconds (10 minutes * 60 seconds)
+DURATION=$((10 * 60))
+# Interval between messages in seconds
+INTERVAL=5
+# End time calculation
+END_TIME=$((SECONDS + DURATION))
+
+# Loop until the current time is less than the end time
+while [ $SECONDS -lt $END_TIME ]; do
+  echo "Hello world - from bash!"
+  sleep $INTERVAL
+done

readme.md

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+# Hello World in Docker
+
+## Bash
+```bash
+docker buildx build -t hello-world-bash -f Dockerfile.bash .
+docker run --rm --name "helloWorldBash" hello-world-bash 
+```
+
+## Python
+```bash
+docker buildx build -t hello-world-python -f Dockerfile.python .
+docker run --rm -it --name "helloWorldPython" hello-world-python
+```
+
+## Python in Alpine
+```bash
+docker buildx build -t hello-world-python-alpine -f Dockerfile.python-alpine .
+docker run --rm -it --name "helloWorldPythonAlpine" hello-world-python-alpine
+```
+
+# Let's see how much space each image takes up
+```bash
+docker images
+```
+
+```bash
+REPOSITORY                   TAG       IMAGE ID       CREATED          SIZE
+hello-world-bash             latest    7fab71e07670   21 seconds ago   101MB
+hello-world-python-alpine    latest    e42435db8b4a   30 minutes ago   53.4MB
+hello-world-python           latest    9fe43bb44dca   47 minutes ago   1GB
+```