[Docs] Fix links in Basic Concepts (#1158)

* Remove issue id from links and just redirect to project repo

pwa-devdocs/src/technologies/basic-concepts/index.md

@@ -2,85 +2,85 @@
 title: Basic Concepts
 ---
 
-The tools provided by the Magento PWA Studio project allows you to create websites that are fast, mobile-friendly, and reliable. 
+The tools provided by the Magento PWA Studio project allows you to create websites that are fast, mobile-friendly, and reliable.
 This topic lists the basic concepts you need to know to work with the Magento PWA Studio tools.
 
 ## Application shell
 
-An application shell provides the basic user interface structure for a progressive web application.    
+An application shell provides the basic user interface structure for a progressive web application.
 
 For more information, see [Application shell][].
 
 ## Service worker
 
 A service worker is a script that runs in the background.
-Progressive web applications use service workers for caching and resource retrieval.    
-<sub>[ *[Help write this topic][Service Worker]* ]</sub>
+Progressive web applications use service workers for caching and resource retrieval.  
+<sub>[ _[Help write this topic][service worker]_ ]</sub>
 
 ## Component data binding
 
 Component data binding refers to the way data flows between the source and a UI component.
-Progressive web applications use data binding patterns to connect dynamic data with the user interface.   
-<sub>[ *[Help write this topic][Component data binding]* ]</sub>
+Progressive web applications use data binding patterns to connect dynamic data with the user interface.  
+<sub>[ _[Help write this topic][component data binding]_ ]</sub>
 
 ## GraphQL
 
 GraphQL is a specification for a data query language client side and a service layer on the server side.
-It is used to request and push data in a progressive web application.   
+It is used to request and push data in a progressive web application.
 
 For more information, see [GraphQL][].
 
 ## CSS modules
 
 CSS modules are modular and reusable CSS styles.
-This allows you to develop components with styles that do not conflict with external style definitions.   
+This allows you to develop components with styles that do not conflict with external style definitions.
 
 For more information, see [CSS modules][].
 
 ## Client state, reducers, and actions
 
-Client state, reducers, and actions are [Redux] concepts used to manage and handle the state of a web application.  
-<sub>[ *[Help write this topic][Client state, reducers, and actions]* ]</sub>
+Client state, reducers, and actions are [Redux][] concepts used to manage and handle the state of a web application.  
+<sub>[ _[Help write this topic][client state, reducers, and actions]_ ]</sub>
 
 ## Loading and offline states
 
-Loading and offline are both states that must be handled by progressive web applications.   
-<sub>[ *[Help write this topic][Loading and offline states]* ]</sub>
+Loading and offline are both states that must be handled by progressive web applications.  
+<sub>[ _[Help write this topic][loading and offline states]_ ]</sub>
 
 ## Container extensibility
 
-Writing extensible containers allow others to re-use and alter your container without modifying the source. 
+Writing extensible containers allow others to re-use and alter your container without modifying the source.
 
-For more information, see [Container extensibility].
+For more information, see [Container extensibility][].
 
 ## Performance patterns
 
 Performance is an important feature for a progressive web app.
-There are many strategies and patterns available to help boost the performance of a PWA.   
-<sub>[ *[Help write this topic][Performance patterns]* ]</sub>
+There are many strategies and patterns available to help boost the performance of a PWA.  
+<sub>[ _[Help write this topic][performance patterns]_ ]</sub>
 
 ## Root components and routing
 
 The root component of an application is the DOM node under which all other nodes are managed by React.
-Routing is the ability to map a URL pattern to the appropriate handler.   
-<sub>[ *[Help write this topic][Performance patterns]* ]</sub>
+Routing is the ability to map a URL pattern to the appropriate handler.  
+<sub>[ _[Help write this topic][root components and routing]_ ]</sub>
 
 ## Critical path
 
 The critical path for rendering refers to the steps the browser takes to process the HTML, CSS, and JavaScript files to display a website.
-Optimizing the critical path is important to get the best performance out of a progressive web application.   
-<sub>[ *[Help write this topic][Critical path]* ]</sub>
-
-[Redux]: https://redux.js.org/introduction/core-concepts
-
-[Service worker]: {{ site.data.vars.repo }}/issues/14
-[Component data binding]: {{ site.data.vars.repo }}/issues/9
-[Client state, reducers, and actions]: {{ site.data.vars.repo }}/issues/12
-[Loading and offline states]: {{ site.data.vars.repo }}/issues/13
-[Container extensibility]: {{ site.baseurl }}{%link technologies/basic-concepts/container-extensibility/index.md %}
-[Performance patterns]: {{ site.data.vars.repo }}/issues/16
-[Root components and routing]: {{ site.data.vars.repo }}/issues/17
-[Critical path]: {{ site.data.vars.repo }}/issues/18
-[GraphQL]: {{ site.baseurl}}{%link technologies/basic-concepts/graphql/index.md %}
-[CSS modules]: {{ site.baseurl }}{%link technologies/basic-concepts/css-modules/index.md %}
-[Application shell]: {{site.baseurl}}{%link technologies/basic-concepts/app-shell/index.md %}
+Optimizing the critical path is important to get the best performance out of a progressive web application.  
+<sub>[ _[Help write this topic][critical path]_ ]</sub>
+
+[container extensibility]: {{ site.baseurl }}{%link technologies/basic-concepts/container-extensibility/index.md %}
+[graphql]: {{ site.baseurl}}{%link technologies/basic-concepts/graphql/index.md %}
+[css modules]: {{ site.baseurl }}{%link technologies/basic-concepts/css-modules/index.md %}
+[application shell]: {{site.baseurl}}{%link technologies/basic-concepts/app-shell/index.md %}
+
+[redux]: https://redux.js.org/introduction/core-concepts
+[service worker]: https://github.com/magento-research/pwa-studio
+[component data binding]: https://github.com/magento-research/pwa-studio
+[client state, reducers, and actions]: https://github.com/magento-research/pwa-studio
+[loading and offline states]: https://github.com/magento-research/pwa-studio
+[performance patterns]: https://github.com/magento-research/pwa-studio
+[root components and routing]: https://github.com/magento-research/pwa-studio
+[critical path]: https://github.com/magento-research/pwa-studio