feat: include data-generator build in Dockerfile

Dockerfile

@@ -26,7 +26,14 @@ RUN GITCOMMIT=$(git rev-parse HEAD) \
     -ldflags="-X 'github.com/uc-cdis/cohort-middleware/version.GitCommit=${GITCOMMIT}' -X 'github.com/uc-cdis/cohort-middleware/version.GitVersion=${GITVERSION}'" \
     -o /cohort-middleware
 
+RUN GITCOMMIT=$(git rev-parse HEAD) \
+    GITVERSION=$(git describe --always --tags) \
+    && go build -C tests/data_generator \
+    -o /data-generator
+
 FROM scratch
 COPY --from=builder /etc/pki/ca-trust/extracted/pem/tls-ca-bundle.pem /etc/ssl/certs/ca-certificates.crt
 COPY --from=builder /cohort-middleware /cohort-middleware
+COPY --from=builder /data-generator /data-generator
+
 CMD ["/cohort-middleware"]