Dockerfile: Make binary more reproducible

Signed-off-by: Paweł Gronowski <me@woland.xyz>

Author: vvoland

Dockerfile

@@ -10,10 +10,13 @@ RUN --mount=type=cache,target=/go/pkg/mod \
 
 ARG TARGETOS
 ARG TARGETARCH
+ARG SOURCE_DATE_EPOCH=0
 RUN --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
     --mount=type=bind,source=. \
-    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -o /linkwinbt ./cmd/linkwinbt/main.go
+    CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build \
+        -trimpath -buildvcs=false -ldflags="-s -w" \
+        -o /linkwinbt ./cmd/linkwinbt/main.go
 
 # binary
 FROM scratch AS binary