Move package to src/ to properly separate what goes into docker image

src/Dockerfile

@@ -0,0 +1,11 @@
+FROM restic/restic:0.9.6
+
+RUN apk update && apk add python3 dcron mariadb-client postgresql-client
+
+ADD . /restic-compose-backup
+WORKDIR /restic-compose-backup
+RUN pip3 install -U pip setuptools && pip3 install -e .
+ENV XDG_CACHE_HOME=/cache
+
+ENTRYPOINT []
+CMD ["./entrypoint.sh"]