Use --production flag for shards installation on docker

Author: SamantazFox

docker/Dockerfile

@@ -6,7 +6,7 @@ ARG release
 WORKDIR /invidious
 COPY ./shard.yml ./shard.yml
 COPY ./shard.lock ./shard.lock
-RUN shards install
+RUN shards install --production
 
 COPY --from=quay.io/invidious/lsquic-compiled /root/liblsquic.a ./lib/lsquic/src/lsquic/ext/liblsquic.a
 

docker/Dockerfile.arm64

@@ -6,7 +6,7 @@ ARG release
 WORKDIR /invidious
 COPY ./shard.yml ./shard.yml
 COPY ./shard.lock ./shard.lock
-RUN shards install
+RUN shards install --production
 
 COPY --from=quay.io/invidious/lsquic-compiled /root/liblsquic.a ./lib/lsquic/src/lsquic/ext/liblsquic.a