build in CI, not in docker

.woodpecker.yml

@@ -7,6 +7,13 @@
       - go_build_cache:/root/.cache/go-build
       - go_mod_cache:/go/pkg/mod
   build:
+    image: golang:1.26
+    commands:
+      - RUN CGO_ENABLED=0 GOOS=linux go build -o server ./cmd/serve
+    volumes:
+      - go_build_cache:/root/.cache/go-build
+      - go_mod_cache:/go/pkg/mod
+  container:
     image: docker
     commands:
       - apk add curl

Dockerfile

@@ -1,9 +1,3 @@
-FROM golang:1.26
-WORKDIR /src
-COPY . ./
-RUN CGO_ENABLED=0 GOOS=linux go build -o server ./cmd/serve
-
 FROM scratch 
-COPY --from=0 /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY server ./
-COPY --from=0 /src/server ./
 CMD ["/server"]