Add default debian sources for amd64 builds

stage0/00-configure-apt/00-run.sh

@@ -8,6 +8,9 @@ if [[ "${ARCH}" == "arm64" || "${ARCH}" == "armhf" ]]; then
 	install -m 644 files/raspi.sources "${ROOTFS_DIR}/etc/apt/sources.list.d/"
 	sed -i "s/RELEASE/${RELEASE}/g" "${ROOTFS_DIR}/etc/apt/sources.list.d/raspbian.sources"
 	sed -i "s/RELEASE/${RELEASE}/g" "${ROOTFS_DIR}/etc/apt/sources.list.d/raspi.sources"
+elif [[ "${ARCH}" == "amd64" ]]; then
+	install -m 644 files/debian.sources "${ROOTFS_DIR}/etc/apt/sources.list.d/"
+	sed -i "s/RELEASE/${RELEASE}/g" "${ROOTFS_DIR}/etc/apt/sources.list.d/debian.sources"
 fi
 
 # Configure oxmc apt sources

stage0/00-configure-apt/files/debian.sources

@@ -0,0 +1,11 @@
+Types: deb
+URIs: https://deb.debian.org/debian
+Suites: RELEASE RELEASE-updates
+Components: main contrib non-free non-free-firmware
+Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg
+
+Types: deb
+URIs: https://security.debian.org/debian-security
+Suites: RELEASE-security
+Components: main contrib non-free non-free-firmware
+Signed-By: /usr/share/keyrings/debian-archive-keyring.gpg