Fix dockerfile (#6)

.github/workflows/publish-docker.yml

@@ -21,11 +21,6 @@ on:
 
 jobs:
   buildAndPush:
-    strategy:
-      matrix:
-        image:
-        - name: cluster-api-provider-metal
-          target: manager
     permissions:
       contents: read
       packages: write
@@ -37,7 +32,7 @@ jobs:
       id: meta
       with:
         images: |
-          ghcr.io/${{ github.repository_owner }}/${{ matrix.image.name }}
+          ghcr.io/${{ github.repository_owner }}/cluster-api-metal-controller
         tags: |
           type=semver,pattern={{version}}
           type=schedule
@@ -79,4 +74,4 @@ jobs:
         push: ${{ github.event_name != 'pull_request' }}
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}
-        target: ${{ matrix.image.target }}
+        target: manager

Dockerfile

@@ -1,5 +1,5 @@
 # Build the manager binary
-FROM golang:1.22 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.22 AS builder
 ARG TARGETOS
 ARG TARGETARCH
 
@@ -14,18 +14,21 @@ RUN go mod download
 # Copy the go source
 COPY cmd/main.go cmd/main.go
 COPY api/ api/
-COPY internal/controller/ internal/controller/
+COPY internal/ internal/
 
 # Build
 # the GOARCH has not a default value to allow the binary be built according to the host where the command
 # was called. For example, if we call make docker-build in a local env which has the Apple Silicon M1 SO
 # the docker BUILDPLATFORM arg will be linux/arm64 when for Apple x86 it will be linux/amd64. Therefore,
 # by leaving it empty we can ensure that the container and binary shipped on it will have the same platform.
-RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/main.go
+RUN --mount=type=cache,target=/root/.cache/go-build \
+    --mount=type=cache,target=/go/pkg \
+    CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -a -o manager cmd/main.go
+
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM gcr.io/distroless/static:nonroot
+FROM gcr.io/distroless/static:nonroot AS manager
 WORKDIR /
 COPY --from=builder /workspace/manager .
 USER 65532:65532