194 feature support multiple application in analytics app

[Gotfrid]

Closes #194

Changes description

This PR introduces the UI and server changes to be able to switch between multiple application logs. If there is only one application, it should not be a problem: the dropdown will have only one choice.

I thought about the alternative idea to have multiple apps at once, but I think it would blow the scope of this issue too much, since it would require careful considerations for how the plots are aggregated.

As a side-track bonus, I have added devcontainer configuration that installs all required packages and allows the developer to work either in VS Code or in RStudio. You can even run docker-compose inside this docker container.

How to test

You can test it the way you are used to, but the way I do it with the devcontainer:

• open the folder in vscode, then reopen in devcontainer
• wait for all processes to complete (takes some time)
• then start the telemetry database with

cd inst/examples/postgres
docker-compose up

• then start r session by running ctrl+shift+p -> attach active r terminal
• in the R console

devtools::load_all()
shiny::shinyAppFile(system.file("examples", "postgresql", "postgres_app.R", package = "shiny.telemetry"))

• then edit the postgres_app.R to feature a different app_name, and repeat the previous step
• finally run the postgres analytics app in a similar way to see the result

This is what I'm able to see:

Definition of done

• Have you read the Contributing Guidelines?
• NEWS.md file has been updated
• Development version has been bumped (x.y.z.90XX)
• Issue has been linked with this PR (via Closing keywords or right sidebar under Development)

[averissimo]

Thanks for the PR!! 💯

Please use dplyr pipe operator as the package doesn't depend on R >= 4.1

[averissimo]

Awesome addition!!

Thanks @Gotfrid 🥳