fix: Dockerfile and CI issues (#1)

* fix: Refer to valid digest of regctl image

The initial reference to the regctl docker image had a digest from the
regsync image.

Signed-off-by: Erik Swanson <erik@retailnext.net>

* fix: Write to /tmp in validation script

The default working directory is not writable by the image user.

Signed-off-by: Erik Swanson <erik@retailnext.net>

* fix: Don't skip "Build Images"

Instead, always build the images but don't push unless it's a merge to
main.

Signed-off-by: Erik Swanson <erik@retailnext.net>

---------

Signed-off-by: Erik Swanson <erik@retailnext.net>

Author: eriksw

.github/workflows/ci.yaml

@@ -68,7 +68,6 @@ jobs:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
       - name: Build images
         uses: docker/build-push-action@v4
-        if: ${{ github.ref == 'refs/heads/main' }}
         with:
           context: .
           platforms: linux/amd64,linux/arm64

Dockerfile

@@ -10,7 +10,7 @@ COPY ./ ./
 
 RUN CGO_ENABLED=0 go build -o /go/bin/composevalidate -trimpath -ldflags="-s -w" .
 
-FROM ghcr.io/regclient/regctl:edge-alpine@sha256:8946dfb6aa44af4985701d0ad0fb740de7c500e6ae5c7a6300dbcb800a84a17c
+FROM ghcr.io/regclient/regctl:edge-alpine@sha256:c3c21f3c7900a02ed813a577c0619693166e21a6e8da232bfc39fbf628e91200
 
 COPY --from=build /go/bin/composevalidate /usr/local/bin/
 

ci/validate.sh

@@ -4,15 +4,15 @@ set -euo pipefail
 # Make sure regctl can be invoked
 regctl version
 
-cat > compose.yaml <<EOF
+cat > /tmp/compose.yaml <<EOF
 ---
 services:
   regctl:
     image: ghcr.io/regclient/regctl:edge-alpine
 EOF
 
-composevalidate compose.yaml
+composevalidate /tmp/compose.yaml
 
-composevalidate --platform linux/arm64 --architecture arm64 compose.yaml
+composevalidate --platform linux/arm64 --architecture arm64 /tmp/compose.yaml
 
 echo "Image OK!"