fix(dashboard): correctly set current git commit hash during build

Dockerfile.dashboard

@@ -3,12 +3,14 @@ FROM alpine:latest as builder
 RUN apk add nodejs-current yarn go git
 
 COPY dashboard/ /build
+COPY .git/ /build/.git
+
 WORKDIR /build
 
 RUN yarn install --frozen-lockfile
 RUN yarn build
 
-RUN go build -ldflags "-X dashboard/main.version=$(git rev-parse HEAD)"
+RUN sh -c 'go build -ldflags "-X main.version=$(git rev-parse HEAD)"'
 
 FROM alpine:latest