Fix build.

Dockerfile

@@ -14,7 +14,9 @@ ARG GIT_VDBTO_TOKEN
 # Get dependencies - will also be cached if we won't change go.mod/go.sum
 WORKDIR /go-ethereum/
 COPY go.mod go.sum .
+COPY wrapmain wrapmain
 RUN if [ -n "$GIT_VDBTO_TOKEN" ]; then git config --global url."https://$GIT_VDBTO_TOKEN:@git.vdb.to/".insteadOf "https://git.vdb.to/"; fi && \
+    cd wrapmain && \
     go mod download && \
     rm -f ~/.gitconfig