Native builds in Docker file and multiarch build by Drone

.drone.yml

@@ -1,2 +1,2 @@
 kind: template
-load: docker.yaml
+load: docker-multiarch.yaml

Dockerfile

@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.21-alpine as build
+FROM golang:1.21-alpine as build
 RUN apk add ca-certificates
 
 WORKDIR /godoor
@@ -9,11 +9,8 @@ RUN go mod download && go mod verify
 
 
 COPY . .
-ARG TARGETARCH
-ARG TARGETOS
+
 ENV GOBUILDLDFLAGS="-linkmode 'external' -extldflags '-static'"
-ENV GOOS=$TARGETOS
-ENV GOARCH=$TARGETARCH
 RUN go build -tags netgo .
 
 FROM scratch

README.md

@@ -13,12 +13,6 @@ GOOS=linux GOARCH=arm64 go build
 scp godoor rpi4b:
 ```
 
-## Cross platform buils with containerd/nerdctl
-
-    sudo nerdctl build --tag godoor --output type=oci --platform linux/amd64,linux/arm64 .
-
-Nerdctl needs `type=oci` passed to its BuildKit backend, otherwise it will build a legacy Docker image.
-
 # Deployment
 
 The CI system should automatically build docker image and push it to [Harbor](https://harbor.k-space.ee)