fix: bring back GIT revision to our prod images (#3537)

This was likely broken since #3313 and leads to IOx reporting `UKNOWN`
instead of a proper GIT revision. Having the latter one available can be
very useful for debugging a binary or if you look through log files (we
print the IOx version and revision during server startup).

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Dockerfile

@@ -6,7 +6,7 @@ FROM rust:${RUST_VERSION}-slim-bullseye as build
 USER root
 
 RUN apt update \
-    && apt install --yes binutils build-essential pkg-config libssl-dev clang lld \
+    && apt install --yes binutils build-essential pkg-config libssl-dev clang lld git \
     && rm -rf /var/lib/{apt,dpkg,cache,log}
 
 # Build influxdb_iox

Dockerfile.dockerignore

@@ -2,4 +2,5 @@
 target/
 tests/
 docker/
+!.git/
 !docker/entrypoint.sh