Publish a Shiny App

• Create a project and set it up for App publishing
• Publish a simple two file Shiny App to make it globally discoverable
• Observe how other users in Domino can use the App

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Set up the Project

1. From the home page, click Develop > Projects.
2. Click New Project.
3. Give your project an informative name, choose the Private visibility setting, then click Create Project.
4. Click Settings in the project sidebar, then set the Compute environment to Domino Standard Environment Py3.8 R4.1. Read Domino standard environments to learn more about the contents of this base image.
5. Click Code in the project sidebar, then click Add File.
6. Name the file server.R in the title field above the editor. It’s important that the file be named exactly this, as launching Shiny application with two files, requires a directory to contain files named server.R and ui.R.
7. In the body of the file, paste the following example Shiny server code.
   # Rely on the 'WorldPhones' dataset in the datasets
   # package (which generally comes preloaded).
   library(datasets)
   # Define a server for the Shiny app
   function(input, output) {
     # Fill in the spot we created for a plot
     output$phonePlot <- renderPlot({
     # Render a barplot
     barplot(WorldPhones[,input$region]*1000,
     main=input$region,
     ylab="Number of Telephones",
     xlab="Year")
     })
   }
   
8. Click Save when finished.
9. Click Add File again, and name the new file ui.R.
10. Paste in the following content, then click Save when finished.
    # Rely on the 'WorldPhones' dataset in the datasets
    # package (which generally comes preloaded).
    library(datasets)
    # Use a fluid Bootstrap layout
    fluidPage(
      # Give the page a title
      titlePanel("Telephones by region"),
      # Generate a row with a sidebar
      sidebarLayout(
        # Define the sidebar with one input
        sidebarPanel(
          selectInput("region", "Region:",
                      choices=colnames(WorldPhones)),
          hr(),
          helpText("Data from AT&T (1961) The World's Telephones.")
        ),
        # Create a spot for the barplot
        mainPanel(
          plotOutput("phonePlot")
        )
      )
    )
    
11. The last thing to do before publishing your App is to create an app.R file. This is a script that Domino runs after initializing the host that serves your App. It should contain all commands required to launch your App. In this example, the only command you need is:
    shiny::runApp("./", port = 8888, host = "0.0.0.0")
    
    The host and port parameters control where Domino directs App traffic. Apps published in Domino must use host 0.0.0.0 and port 8888. Create the app.R file the same way you created server.R and ui.R, then save it.

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Publish and deploy the App

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Scale a Shiny App

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