Add Windows Server 2025 images for v3.6

Author: jnoordsij

v3.6/windows/nanoserver-ltsc2025/Dockerfile

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+FROM mcr.microsoft.com/windows/nanoserver:ltsc2025
+
+COPY --from=traefik:v3.6.7-windowsservercore-ltsc2025 /traefik.exe /
+
+EXPOSE 80
+ENTRYPOINT [ "/traefik" ]
+
+# Metadata
+LABEL org.opencontainers.image.vendor="Traefik Labs" \
+    org.opencontainers.image.url="https://traefik.io" \
+    org.opencontainers.image.source="https://github.com/traefik/traefik" \
+    org.opencontainers.image.title="Traefik" \
+    org.opencontainers.image.description="A modern reverse-proxy" \
+    org.opencontainers.image.version="v3.6.7" \
+    org.opencontainers.image.documentation="https://docs.traefik.io"

v3.6/windows/servercore-ltsc2025/Dockerfile

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+FROM  mcr.microsoft.com/windows/servercore:ltsc2025
+SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+RUN Invoke-WebRequest \
+        -Uri "https://github.com/traefik/traefik/releases/download/v3.6.7/traefik_v3.6.7_windows_amd64.zip" \
+        -OutFile "/traefik.zip"; \
+    Expand-Archive -Path "/traefik.zip" -DestinationPath "/" -Force; \
+    Remove-Item "/traefik.zip" -Force
+
+EXPOSE 80
+ENTRYPOINT [ "/traefik" ]
+
+# Metadata
+LABEL org.opencontainers.image.vendor="Traefik Labs" \
+    org.opencontainers.image.url="https://traefik.io" \
+    org.opencontainers.image.source="https://github.com/traefik/traefik" \
+    org.opencontainers.image.title="Traefik" \
+    org.opencontainers.image.description="A modern reverse-proxy" \
+    org.opencontainers.image.version="v3.6.7" \
+    org.opencontainers.image.documentation="https://docs.traefik.io"