Containerfile: Fix vcs info not stamped when listing .go files directly

See golang/go#51279 for reference.

Signed-off-by: Eric Lippmann <[email protected]>

Author: oxzi

Containerfile

@@ -17,7 +17,7 @@ FROM base AS build
 RUN --mount=target=. \
     --mount=type=cache,target=/go/pkg/mod \
     --mount=type=cache,target=/root/.cache/go-build \
-    CGO_ENABLED=0 go build -trimpath -ldflags '-s -w' -o /icingadb ./cmd/icingadb/main.go
+    CGO_ENABLED=0 go build -trimpath -ldflags '-s -w' -o /icingadb ./cmd/icingadb
 
 FROM scratch