chore: migrate to object_store

Move to the more modern and maintained object_store
library to access generic buckets.

We should be able also to do streaming of files now,
and proceed by implementing paginated results for listings
if we want.

Fixes #1.

Containerfile

@@ -0,0 +1,21 @@
+# SPDX-FileCopyrightText: © Matteo Settenvini <matteo.settenvini@montecristosoftware.eu>
+# SPDX-License-Identifier: EUPL-1.2
+
+FROM docker.io/rust:1.88-alpine3.20
+
+RUN apk --no-cache add musl-dev && \
+    cargo install --path .
+
+FROM docker.io/alpine:3.20
+
+COPY --from=rust /usr/local/cargo/bin/serves3 /usr/bin/serves3
+
+EXPOSE 8000
+
+ENV ROCKET_PROFILE=production
+
+# This env variable should be in the format:
+# {endpoint=<endpoint>,region=<region>,access_key_id=<access_key_id>,secret_access_key=<secret_access_key>}
+ENV ROCKET_S3_BUCKET={endpoint=,region=,access_key_id=,secret_access_key=}
+
+CMD ["serves3"]