add: backup scripts and docker image

Dockerfile

@@ -0,0 +1,11 @@
+FROM mcuadros/ofelia:latest
+
+COPY --chmod=775 ./scripts /usr/local/bin
+
+RUN mkdir -p ${BACKUP_PATH:-/var/data/backup}
+
+ARG OFELIA_CONFIG_PATH=/etc/ofelia/config.ini
+ARG DEBUG
+ARG BACKUP_DATABASES
+
+RUN ofelia-config.sh --save