fix var

Author: jacdavi

m365/image/Dockerfile

@@ -25,7 +25,7 @@ RUN Initialize-SCuBA -Scope AllUsers -NoOPA
 COPY run_container.ps1 .
 
 ENV OPA_PATH="C:\app\opa_windows_amd64.exe"
-RUN Invoke-WebRequest -Uri https://openpolicyagent.org/downloads/v%OPA_VERSION%/opa_windows_amd64.exe -OutFile $Env:OPA_PATH -UseBasicParsing
+RUN Invoke-WebRequest -Uri https://openpolicyagent.org/downloads/v$($Env:OPA_VERSION)/opa_windows_amd64.exe -OutFile $Env:OPA_PATH -UseBasicParsing
 RUN if ((Get-FileHash $Env:OPA_PATH -Algorithm SHA265).Hash -ne (Invoke-WebRequest -Uri https://openpolicyagent.org/downloads/v%OPA_VERSION%/opa_windows_amd64.exe.sha256).Content) { exit 1 }
 RUN icacls.exe $env:OPA_PATH /grant "User Manager\ContainerUser":RX
 USER ContainerUser