docs: explain what a deploy url is and how it differs from a base href (#42363)
docs: explain what a deploy url is and how it differs from a base href (#42363)

fixes #34931

PR Close #42363

brandonroberts/angular,angular-indonesia/angular,shairez/angular,gkalpak/angular,brandonroberts/angular,brandonroberts/angular,mgechev/angular,angular/angular,shairez/angular,JiaLiPassion/angular,gkalpak/angular,ocombe/angular,angular-indonesia/angular,brandonroberts/angular,gkalpak/angular,gkalpak/angular,ocombe/angular,JiaLiPassion/angular,JiaLiPassion/angular,manekinekko/angular,angular/angular,mgechev/angular,brandonroberts/angular,ocombe/angular,gnomeontherun/angular,shairez/angular,mgechev/angular,gnomeontherun/angular,angular-indonesia/angular,ocombe/angular,gnomeontherun/angular,manekinekko/angular,manekinekko/angular,manekinekko/angular,ocombe/angular,manekinekko/angular,angular-indonesia/angular,shairez/angular,brandonroberts/angular,JiaLiPassion/angular,shairez/angular,angular/angular,mgechev/angular,angular/angular,ocombe/angular,manekinekko/angular,gnomeontherun/angular,mgechev/angular