Fix: Remove build for ARMv5, as Go does not support ARMv5 images anym…

…ore.

.github/actions/build-postfix-exporter/action.yaml

@@ -68,7 +68,7 @@ runs:
         push: true
         tags: '${{ inputs.tags }}'
         labels: ${{ steps.meta.outputs.labels }}
-        platforms: "linux/amd64,linux/arm/v5,linux/arm/v7,linux/arm64/v8,linux/mips64le,linux/ppc64le,linux/s390x"
+        platforms: "linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/mips64le,linux/ppc64le,linux/s390x"
         # linux/386,linux/arm/v6,linux/arm64,linux/riscv64"
         cache-from: type=local,src=/tmp/.buildx-cache/postfix-exporter,mode=max,compression=estargz
         cache-to: type=local,dest=/tmp/.buildx-cache-new/postfix-exporter

postfix-exporter-01.patch

@@ -5,7 +5,7 @@ index 75a22d8..81145c9 100644
 @@ -1,8 +1,41 @@
 -FROM scratch
 +# syntax=docker/dockerfile:1.2
-+FROM --platform=$BUILDPLATFORM golang:1.23 AS builder
++FROM golang:1.23 AS builder
  LABEL org.opencontainers.image.source="https://github.com/hsn723/postfix_exporter" \
          org.opencontainers.image.authors="Hsn723" \
          org.opencontainers.image.title="postfix_exporter"
@@ -38,7 +38,6 @@ index 75a22d8..81145c9 100644
 +# Since we are checking out a specific SHA hash and we know this tests have worked previously, we are quite certain that the code will work.
 +# Hence disabling the test here.
 +# RUN go test
-+RUN echo "I am running on $BUILDPLATFORM, building for $TARGETPLATFORM $TARGETOS/$TARGETARCH/$TARGETVARIANT"
 +RUN env GOOS="${TARGETOS}" GOARCH="${TARGETARCH}" GOARM="$( echo "$TARGETVARIANT" | grep -E -o "\\d+$")" go build -ldflags '-extldflags "-static"'  -o /bin/postfix_exporter
 +
 +FROM scratch