Optimize build speed

Removing -a means the template can use a cache and doesn't
need to rebuild the image every time.

This is much quicker.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Author: alexellis

template/golang-http/Dockerfile

@@ -35,9 +35,9 @@ RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} GOFLAGS=${GOFLAGS} go test ./... -cove
 
 WORKDIR /go/src/handler
 RUN CGO_ENABLED=${CGO_ENABLED} GOOS=${TARGETOS} GOARCH=${TARGETARCH} GOFLAGS=${GOFLAGS} \
-    go build --ldflags "-s -w" -a -installsuffix cgo -o handler .
+    go build --ldflags "-s -w" -o handler .
 
-FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine:3.17.1 as ship
+FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine:3.17.2 as ship
 # Add non root user and certs
 
 RUN apk --no-cache add ca-certificates \

template/golang-middleware/Dockerfile

@@ -32,9 +32,9 @@ RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go test ./... -cover
 
 WORKDIR /go/src/handler
 RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} \
-    go build --ldflags "-s -w" -a -installsuffix cgo -o handler .
+    go build --ldflags "-s -w" -o handler .
 
-FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine:3.17.1 as ship
+FROM --platform=${TARGETPLATFORM:-linux/amd64} alpine:3.17.2 as ship
 
 # Add non root user and certs
 RUN apk --no-cache add ca-certificates \