Fix broken link

Also includes some basic fixes to Markdown to make it
adhere to styleguide.

doc/development/fe_guide/style_guide_js.md

 # Style guides and linting
+
 See the relevant style guides for our guidelines and for information on linting:
 
 ## JavaScript
+
 We defer to [Airbnb][airbnb-js-style-guide] on most style-related
 conventions and enforce them with eslint.
 
-See [our current .eslintrc][eslintrc] for specific rules and patterns.
+See [our current .eslintrc](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/.eslintrc.yml) for specific rules and patterns.
 
 ### Common
 
@@ -299,10 +301,12 @@ Do not use them anymore and feel free to remove them when refactoring legacy cod
 ### Vue.js
 
 #### `eslint-vue-plugin`
+
 We default to [eslint-vue-plugin][eslint-plugin-vue], with the `plugin:vue/recommended`.
 Please check this [rules][eslint-plugin-vue-rules] for more documentation.
 
 #### Basic Rules
+
 1. The service has it's own file
 1. The store has it's own file
 1. Use a function in the bundle file to instantiate the Vue component:
@@ -387,6 +391,7 @@ Please check this [rules][eslint-plugin-vue-rules] for more documentation.
 [#34371]: https://gitlab.com/gitlab-org/gitlab-ce/issues/34371
 
 #### Alignment
+
 1. Follow these alignment styles for the template method:
 
    1. With more than one attribute, all attributes should be on a new line: