Every page the platform shows when an app fails

• The app crashes

  “This site hit an error”

  500
• The app returns an error

  “This site hit an error”

  500
• The app exits without answering

  “This site hit an error”

  500
• The app runs out of memory

  “This site hit an error”

  500
• The app waits past its time limit

  “This site took too long to answer”, after 3 seconds

  504
• The app computes past its time limit

  “This site took too long to answer”, after 3 seconds

  504
• No app at this address

  “Nothing is here yet”, on a host nothing is bound to

  404