Is your feature request related to a problem? Please describe.
While compiling a file without selecting any board we get compile time error, So either the error should be meaningful like "SELECT BOARD BEFORE COMPILING" Or Default Arduino Uno should be set for compiling for first time user Or User should be prompted to select any board as he has not selected any board and will get error.

Error on compiling when board is not selected and this error is meaningless for a new user
https://raw.githubusercontent.com/mishracodes/mishracodes.github.io/master/github%20Bugs/bug%203.png

No Error after selecting board and compiling
https://raw.githubusercontent.com/mishracodes/mishracodes.github.io/master/github%20Bugs/bug%204.png

Describe the solution you'd like
Adding default board as Arduino Uno for the 1st time user, means the board should be default selected as Arduino Uno for the users who are running this application for the first time.
OR
Users must be prompted to set the board when we hit compile for the first time As when no board is selected and when the user hits compile then it is giving error which is not a good sign and also the error is not meaningful for normal user.

Describe alternatives you've considered
Either a default Arduino Uno board should be pre selected, OR User should be prompted to select the board before compiling cod for the first time