[Vuejs]-Vue component css being overwriten by bootstrapp-sass on Laravel

1. Include the bootstrap.css file before the bundled webpack file.
2. Use clear selectors, because they are called in hierachy. Like inline, id, class… the more precise selector is used.

The following list of selector types increases by specificity:
https://developer.mozilla.org/en-US/docs/Web/CSS/Specificity#Selector_Types