fix: simplify further

Author: fancybear-dev

Dockerfile

@@ -10,8 +10,17 @@ WORKDIR "C:/Program Files/Vector"
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
-RUN Write-Host "VECTOR_VERSION: $env:VECTOR_VERSION"; \
-    $url = "https://github.com/vectordotdev/vector/releases/download/v${env:VECTOR_VERSION}/vector-${env:VECTOR_VERSION}-x86_64-pc-windows-msvc.zip"; \
+RUN if ($env:VECTOR_VERSION) { \
+        $version = $env:VECTOR_VERSION; \
+        Write-Host "Using pinned VECTOR_VERSION: $version"; \
+    } else { \
+        Write-Host "VECTOR_VERSION not set. Fetching latest version from GitHub API..."; \
+        $apiUrl = "https://api.github.com/repos/vectordotdev/vector/releases/latest"; \
+        $releaseInfo = Invoke-RestMethod -Uri $apiUrl; \
+        $version = $releaseInfo.tag_name.TrimStart('v'); \
+        Write-Host "Latest version found: $version"; \
+    } \
+    $url = "https://github.com/vectordotdev/vector/releases/download/v${version}/vector-${version}-x86_64-pc-windows-msvc.zip"; \
     Write-Host "Download URL: $url"; \
     Invoke-WebRequest -UseBasicParsing -Uri $url -OutFile "vector.zip"; \
     Expand-Archive -Path "vector.zip" -DestinationPath "."; \