fix act_runner downloading

Dockerfile

@@ -1,6 +1,4 @@
 ARG SERVERCORE_VERSION="ltsc2022"
-ARG RUNNER_VERSION="0.2.11"
-
 FROM mcr.microsoft.com/windows/servercore:${SERVERCORE_VERSION}
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
@@ -8,7 +6,6 @@ SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';"]
 # disable telemetry
 ENV POWERSHELL_TELEMETRY_OPTOUT="1"
 
-
 # Set working directory
 WORKDIR /actions-runner
 
@@ -35,9 +32,8 @@ RUN choco install -y visualstudio2022buildtools --package-parameters \" \
 # Add MSBuild to the path
 RUN [Environment]::SetEnvironmentVariable(\"Path\", $env:Path + \";C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Current\Bin\", \"Machine\")
 
-ENV RUNNER_VERSION=${RUNNER_VERSION}
-COPY install-runner.ps1 .
-RUN .\install-runner.ps1; Remove-Item .\install-runner.ps1 -Force
+ARG RUNNER_VERSION="0.2.11"
+ADD https://gitea.com/gitea/act_runner/releases/download/v$RUNNER_VERSION/act_runner-$RUNNER_VERSION-windows-amd64.exe act_runner.exe
 
 COPY entrypoint.ps1 .
 ENTRYPOINT ["pwsh.exe", ".\\entrypoint.ps1"]

install-runner.ps1

@@ -1 +0,0 @@
-Invoke-WebRequest -Uri "https://gitea.com/gitea/act_runner/releases/download/v$env:RUNNER_VERSION/act_runner-$env:RUNNER_VERSION-windows-amd64.exe" -OutFile "act_runner.exe"