fix(container): ensure there is a tmp directory

Author: gsdevme

Dockerfile

@@ -1,7 +1,13 @@
-FROM scratch
+FROM alpine:3 as builder
+
+RUN ls /tmp/
+
+FROM scratch as base
 
 ENV SLACK_SIGNING_SECRET=""
 ENV PORT=8080
 
+COPY --from=builder /tmp /tmp
+
 ENTRYPOINT ["/gitops-commit"]
 COPY gitops-commit /