chore: add alt text to all images

Author: rakannimer

src/docs/documentation/customizing/gatsby-theme.mdx

@@ -55,7 +55,7 @@ $ yarn gatsby develop
 
 If everything works, you should see something like this:
 
-![](https://cdn-std.dprcdn.net/files/acc_649651/Y825GV)
+![Gatsby docz theme preview](https://cdn-std.dprcdn.net/files/acc_649651/Y825GV)
 
 ## Configuration
 

src/docs/documentation/general/deploying-your-docs.mdx

@@ -16,7 +16,7 @@ $ yarn docz:build
 
 If everything goes well, this command will generate all static files for you in the `.docz/dist` folder and you will see something like this in your terminal:
 
-![](https://cdn-std.dprcdn.net/files/acc_649651/qIFhkT)
+![Terminal output](https://cdn-std.dprcdn.net/files/acc_649651/qIFhkT)
 
 With your static files in hand, you can deploy your documentation wherever you want just like you do with any static site.
 
@@ -48,15 +48,15 @@ If you understand nothing about deploys, we highly recommend that you use the se
 
 First, after login or create a new account on Netlify, just create a _New site from git_:
 
-![](https://cdn-std.dprcdn.net/files/acc_649651/YTCDFn)
+![Netlify create new site](https://cdn-std.dprcdn.net/files/acc_649651/YTCDFn)
 
 Connect your Git service and pick some repository:
 
-![](https://cdn-std.dprcdn.net/files/acc_649651/cc2g4u)
+![Netlify pick repository](https://cdn-std.dprcdn.net/files/acc_649651/cc2g4u)
 
 After that, just fill settings like below, passing your build command and the destination folder:
 
-![](https://cdn-std.dprcdn.net/files/acc_649651/3uvA9J)
+![Netlify add settings build command and destination directory](https://cdn-std.dprcdn.net/files/acc_649651/3uvA9J)
 
 Finally, add a file `netlify.toml` to your project's root folder with the following contents:
 

src/docs/documentation/general/getting-started.mdx

@@ -90,7 +90,7 @@ Hello, I'm a mdx file!
 
 With your first `.mdx` document created, you can open your browser and visit `localhost:3000` to see something like this:
 
-![](https://cdn-std.dprcdn.net/files/acc_649651/Y825GV)
+![Hello world preview](https://cdn-std.dprcdn.net/files/acc_649651/Y825GV)
 
 We cover more of what you can do with Docz in [**Built-in Components**](/docs/built-in-components) and what you can do with _MDX_ in the [**Writing MDX**](/docs/writing-mdx) page.