fix: dockerfiles

Signed-off-by: peefy <[email protected]>

docker/amd64/Dockerfile.init

@@ -14,7 +14,13 @@ WORKDIR /
 
 COPY . .
 
-RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o webhook-init cmd/wehbook-init
+# We run go mod download in a separate step so that we can cache its results.
+# This lets us avoid re-downloading modules if we don't need to. The type=target
+# mount tells Docker to mount the current directory read-only in the WORKDIR.
+# The type=cache mount tells Docker to cache the Go modules cache across builds.
+RUN --mount=target=. --mount=type=cache,target=/go/pkg/mod go mod download
+
+RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o webhook-init cmd/wehbook-init/main.go
 
 FROM kcllang/kcl
 

docker/amd64/Dockerfile.server

@@ -14,7 +14,15 @@ WORKDIR /
 
 COPY . .
 
-RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o webhook-server cmd/wehbook-server
+ENV CGO_ENABLED=0
+
+# We run go mod download in a separate step so that we can cache its results.
+# This lets us avoid re-downloading modules if we don't need to. The type=target
+# mount tells Docker to mount the current directory read-only in the WORKDIR.
+# The type=cache mount tells Docker to cache the Go modules cache across builds.
+RUN --mount=target=. --mount=type=cache,target=/go/pkg/mod go mod download
+
+RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o webhook-server cmd/wehbook-server/main.go
 
 FROM kcllang/kcl