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A long time ago, when people built things on computers, they sometimes had a problem. They wanted to share their creations with others, but it was really hard to do because everyone's computer was different, like having different types of Lego blocks, or having a different version of NodeJS, Mongo or JS, having a different set of environment variables, or even working on different Operating systems.
So, a smart person named Solomon Hykes thought of an idea. He wanted to make it easy for people to put their creations in special boxes, like lunchboxes, so that these creations could work on any computer, no matter what Lego blocks (local configuration) it had.
That's how Docker started! It's like putting your favorite toys in special boxes so you can take them to your friend's house and play with them there. These special boxes are called "containers."
# This is a Dockerfile! It's like a recipe to make a special box for our computer toys.
# First, we need a special box to start with. We'll use a box that already has some things inside it.
FROM magic_box
# Now, we want to put our favorite toy car inside the special box.
ADD toy_car /toys/
# We also want to add some yummy snacks, like cookies, to our box.
ADD cookies /snacks/
# We can even write down a note to remind ourselves to share this box with our friends.
LABEL note="Please share with friends!"
# Finally, we'll close the box and seal it up. Now, our special box is ready!
Docker makes it super simple for people to share their computer creations with others. It's like sharing your toys with friends without worrying about them getting mixed up or broken.
So, Docker is like a magical way to keep things neat and tidy when sharing stuff between computers. It's like having special lunchboxes for your computer games and making them easy to share with friends.
Cool, right?
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- Mobile application development involves creating apps for mobile devices, initiated by an idea, which is then designed, programmed, tested, and launched. - Tools used in this include development platforms (Android Studio, Xcode), design software (Sketch, Figma), and testing tools (Appium, Selenium). - Programming languages, such as Java, Swift, or Kotlin, are vital in app development. - Types of mobile applications include iOS, Android, and cross-platform applications. Such apps can be native, hybrid, or web applications. - The costs of mobile application development vary based on architecture, development process stages, budget management, app complexity, and unexpected extra costs. - The development process entails coding, testing, launch, and maintenance, assisted by a variety of tools and developers. - Different industries necessitate different approaches to app development (gaming, e-commerce, social networking, education, health, finance, travel, news etc.) - Advanced concepts in app development include UI/UX design, localization, back-end development, server-side development, wire-framing, prototyping, MVP, Agile development, debugging, updates, and cloud app development. - Marketing, optimising, and safeguarding apps is critical, requiring strategies for promotion, app store optimization, user engagement, analytics, monetization, and data security and privacy.
