Add blog to docs (#484)

* Adding social card infrastructure
* Upgrades doc project to .NET 6
* Adds Playwright
* Changes the console to a web project for Playwright
* Adds social card template
* Added blog content
* Parallelized social image processing
* Updating CI to use .NET 6 for docs build

.github/workflows/ci.yaml

@@ -21,7 +21,8 @@ jobs:
     - name: Setup dotnet
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.301
+        dotnet-version: 6.0.x
+        include-prerelease: true
 
     - name: Setup Node.js
       uses: actions/setup-node@v2

.github/workflows/docs.yaml

@@ -24,7 +24,8 @@ jobs:
     - name: Setup dotnet
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.301
+        dotnet-version: 6.0.x
+        include-prerelease: true
 
     - name: Setup Node.js
       uses: actions/setup-node@v2

.github/workflows/publish.yaml

@@ -29,7 +29,8 @@ jobs:
     - name: Setup dotnet
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 5.0.301
+        dotnet-version: 6.0.x
+        include-prerelease: true
 
     - name: Build
       shell: bash