Download R from (https://www.r-project.org/) (4.1.2). Click "download R".
You can select the default link https://cloud.r-project.org/.
Download and install a version that match your OS.
You can download the free version.
Create a folder in your local machine where you want the project to locate at. Open the terminal and set the direction to the created folder. Run the following commend: "git clone https://github.com/komar41/Big-Yellow-Taxi.git".
Open RStudio. Go to "File" and select "Open Project".
Choose the project folder ("Big-Yellow-Taxi") that you cloned from GitHub.
Open the file "app.R" and press "Run App" button on RStudio.
Rstudio will tell you if you are missing some of the packages. When the pop-up shows up, click "Install" to install all those packages.
After Installation of those packages, RStudio will start a Shiny app on your local machine.