fix: Void Dockerfile — bypass broken repos with --repository flag

Author: porus

tests/docker/Dockerfile.void

@@ -1,11 +1,9 @@
-FROM ghcr.io/void-linux/void-linux:latest
+FROM voidlinux/voidlinux:latest
 
-# Override repos immediately with CDN (most reliable mirror)
-RUN rm -f /usr/share/xbps.d/*.conf \
-    && echo 'repository=https://repo-default.voidlinux.org/current' > /usr/share/xbps.d/00-repository-main.conf \
-    && echo 'repository=https://repo-default.voidlinux.org/current/nonfree' > /usr/share/xbps.d/10-repository-nonfree.conf \
-    && xbps-install -S \
-    && xbps-install -y base-devel curl git cmake nodejs python3 cargo bash \
+# GitHub Actions: default repos point to broken mirror.
+# Use --repository flag to bypass repo configs entirely.
+RUN xbps-install -Sy --repository=https://repo-default.voidlinux.org/current \
+    base-devel curl git cmake nodejs python3 cargo bash \
     && rm -rf /var/cache/xbps/*
 
 CMD ["/bin/bash"]