add ${{ github.server_url }} as allowed substitution

docs/workflow-structure.md

@@ -136,6 +136,7 @@ The following GitHub Actions context expressions are permitted in workflow markd
 - `${{ github.repository }}` - The owner and repository name (e.g., `octocat/Hello-World`)
 - `${{ github.run_id }}` - A unique number for each workflow run within a repository
 - `${{ github.run_number }}` - A unique number for each run of a particular workflow in a repository
+- `${{ github.server_url }}` - Base URL of the server, e.g. https://github.com
 - `${{ github.workflow }}` - The name of the workflow
 
 #### Special Pattern Expressions

pkg/cli/templates/instructions.md

@@ -194,6 +194,7 @@ Use GitHub Actions context expressions throughout the workflow content. **Note:
 - **`${{ github.repository }}`** - Repository name in "owner/name" format
 - **`${{ github.run_id }}`** - Unique ID of the workflow run
 - **`${{ github.run_number }}`** - Number of the workflow run
+- **`${{ github.server_url }}`** - Base URL of the server, e.g. https://github.com
 - **`${{ github.workflow }}`** - Name of the workflow
 
 #### Special Pattern Expressions

pkg/constants/constants.go

@@ -36,5 +36,6 @@ var AllowedExpressions = []string{
 	"github.repository",
 	"github.run_id",
 	"github.run_number",
+	"github.server_url",
 	"github.workflow",
 } // needs., steps. already allowed