Add support/ in Docker image

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

docker/production/Dockerfile

@@ -23,6 +23,7 @@ COPY priv ./priv
 COPY config/config.exs config/prod.exs ./config/
 COPY config/docker.exs ./config/runtime.exs
 COPY rel ./rel
+COPY support ./support
 COPY --from=assets ./priv/static ./priv/static
 
 RUN mix phx.digest \