manibuilder/alpine: Disable TLS verification for Git commands

Pull the `ca-certificates` package but also disable certificate
verification for Git commands, including those that run during
tests. At some point, the `ca-certificates` won't get updates
anymore and, ideally, existing docker images will keep working.

Change-Id: I38c2404c50c97f3ae38fad602f587ce25719a6f3
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66984
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
---
M util/manibuilder/Dockerfile.alpine
1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/util/manibuilder/Dockerfile.alpine b/util/manibuilder/Dockerfile.alpine
index 63d4ba3..35d787a 100644
--- a/util/manibuilder/Dockerfile.alpine
+++ b/util/manibuilder/Dockerfile.alpine
@@ -3,9 +3,10 @@
 RUN \
 	adduser -D mani mani && \
 	apk update && \
-	apk add build-base linux-headers git ccache \
+	apk add ca-certificates build-base linux-headers git ccache \
 		pciutils-dev libusb-compat-dev libusb-dev
 
+ENV GIT_SSL_NO_VERIFY=1
 USER mani
 RUN \
 	cd && \

