Use "dotnet tool" instead of "0install" to get docfx

.config/dotnet-tools.json

@@ -0,0 +1,12 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "docfx": {
+      "version": "2.74.1",
+      "commands": [
+        "docfx"
+      ]
+    }
+  }
+}

doc/build.ps1

@@ -1,7 +1,13 @@
 $ErrorActionPreference = "Stop"
 pushd $PSScriptRoot
 
-..\0install.ps1 run --batch https://apps.0install.net/dotnet/docfx.xml --logLevel=warning --warningsAsErrors docfx.json
-if ($LASTEXITCODE -ne 0) {throw "Exit Code: $LASTEXITCODE"}
+function Run-DotNet {
+    ..\0install.ps1 run --batch --version 6.0.. https://apps.0install.net/dotnet/sdk.xml @args
+    if ($LASTEXITCODE -ne 0) {throw "Exit Code: $LASTEXITCODE"}
+}
+
+# Build docs
+Run-DotNet tool restore
+Run-DotNet docfx --logLevel=warning --warningsAsErrors docfx.json
 
 popd

doc/build.sh

@@ -2,4 +2,13 @@
 set -e
 cd `dirname $0`
 
-../0install.sh run https://apps.0install.net/dotnet/docfx.xml --logLevel=warning --warningsAsErrors docfx.json
+# Find dotnet
+if command -v dotnet > /dev/null 2> /dev/null; then
+    dotnet="dotnet"
+else
+    dotnet="../0install.sh run --version 6.0.. https://apps.0install.net/dotnet/sdk.xml"
+fi
+
+# Build docs
+$dotnet tool restore
+$dotnet docfx --logLevel=warning --warningsAsErrors docfx.json