Environment variables are a way to store configuration settings for your applications. They are key-value pairs that are outside of the application code. Although environment variables work in a similar fashion in both frontend and backend applications, there are some specific considerations for each.

1. Backend Environment Variables
   • Common Syntax
   • Storage

• Security

If you are developing a web application and want to test it on your iPhone, you can access your localhost development server directly from your iPhone. Here's how to do it:

• Ensure both your development machine and iPhone are connected to the same local network (e.g., the same WiFi).

1. Go to your vite.config.js file. And add your base url to it.

• If your repo name is Kool-Vite, then your bsae URL is /Kool-Vite/.

2. Go to your root package.json file. Add homepage and deploy scripts. ```json "homepage": "https://yourGitHubUserName.github.io/repoName/",

-g is a globale tag, I recommend install this globally, and if you don't want to use this package gloabbly, take this tag off

npm i -g npm-check-update

As a developer, you may or may not have set up VMs (Virtual Machines). Developing cross platform we will need to tell our shell such as brew, bash, powershell, or zsh to which path they shall export the command to. So that the shell can translate what you wanted to do from the command line to a language that your machine can understand and execute.

For most developers we use the good old Bash instead of zsh, both of them works. To check which shell you're using:

• In GitBash shell, copy and paste the commeand below in the terminal under your destinated directory:

  find . | grep /node_modules$ | grep -v /node_modules/ | xargs rm -fR

PowerShell on PC does not have this problem where the user set the running environment for SSH Agent:

Start-Service ssh-agent
ssh-add "$env:USERPROFILE\.ssh\id_ed25519"

• When I use the Git Bash program on PC, though I have set up SSH key correctly, each time I must type in password when I git pull or git push.

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• On GitHub, when looking at the Commits in a repo, have you ever noticed the unverified and verified tags?