Fix linux/arm64 image

We were installing amd64 gomplate into the arm64 image.

Author: bennettgoble

.github/workflows/ci.yaml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Run tests
-        run: docker build --target test .
+        run: docker build --build-arg TARGETPLATFORM=linux/amd64 --target test .
   build:
     name: Build
     runs-on: [self-hosted, linux]

Dockerfile

@@ -2,13 +2,14 @@
 # Gomplate 
 ############
 FROM alpine:3 AS gomplate 
-ARG TARGETPLATFORM=linux/amd64
+ARG TARGETPLATFORM
 ARG GOMPLATE_VERSION=3.11.7
 ARG GOMPLATE_AMD64_SHA256=8010a1a4ff15db238f61f02cd716d677aff9a4c7b59335008183f897f46ca9a5
 ARG GOMPLATE_ARM64_SHA256=57ebc2ca8c231a24d5664145f9e731c61a260328ca3a6118fca8b94c37075cd8
 RUN apk add --no-cache curl bash
 SHELL ["/bin/bash", "-c"]
-RUN ARCH=${TARGETPLATFORM/linux\//} \
+RUN echo "Downloading gomplate version ${GOMPLATE_VERSION} for ${TARGETPLATFORM}" \
+    && ARCH=${TARGETPLATFORM/linux\//} \
     && curl -Lf https://github.com/hairyhenderson/gomplate/releases/download/v${GOMPLATE_VERSION}/gomplate_linux-${ARCH}-slim -o /tmp/gomplate \ 
     && sha_envvar="GOMPLATE_${ARCH^^}_SHA256" \
     && GOMPLATE_SHA256="${!sha_envvar}" \