From cd77d637a0e484efac5e164106aa92f3d68870e7 Mon Sep 17 00:00:00 2001
From: hanna littorin <hanna@84codes.com>
Date: Tue, 21 Jul 2026 09:23:23 +0200
Subject: [PATCH] Pin BuildKit to v0.30.0 for testing (not for merge)

Temporary branch to confirm the "unsupported" Heroku push failure is
caused by BuildKit v0.31.0's new oci-mediatypes=true default, by
pinning the builder back to the last known-good version. Not intended
to be deployed or merged - see PR #57 for the actual fix.
---
 .github/workflows/heroku-container.yml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/.github/workflows/heroku-container.yml b/.github/workflows/heroku-container.yml
index 5ebcb94..d154c92 100644
--- a/.github/workflows/heroku-container.yml
+++ b/.github/workflows/heroku-container.yml
@@ -81,6 +81,8 @@ jobs:
           password: ${{ secrets.heroku-key }}
 
       - uses: docker/setup-buildx-action@d7f5e7f509e45cec5c76c4d5afdd7de93d0b3df5 # v4.1.0
+        with:
+          driver-opts: image=moby/buildkit:v0.30.0
 
       - name: Build and push per target
         env: