Add scripts and new Dockerfile for SQLite backups

helper-scripts/Readme.md

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+# Helper Scripts
+
+These are some pre-written pre/post backup/restore scripts that can be used for some common usecases. Eg. Backing up a SQLite database.

helper-scripts/sqlite-scripts/Dockerfile

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+FROM vividboarder/docker-duplicity-cron
+MAINTAINER ViViDboarder <vividboarder@gmail.com>
+
+# Install SQLite
+RUN apt-get update \
+        && apt-get install -y --no-install-recommends sqlite3 \
+        && apt-get clean \
+        && rm -rf /var/apt/lists/*
+
+# Copy SQLite backup scripts
+COPY ./backup /scripts/backup
+COPY ./restore /scripts/restore
+
+# Env that points to sqlite db
+ENV DB_PATH /data/db.sqlite3

helper-scripts/sqlite-scripts/Readme.md

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+# SQLite Backup Scripts
+
+Add these to your image and then set an env variable `$DB_PATH` that points to the database file you wish to backup. This will use the proper SQLite backup command for backups.

helper-scripts/sqlite-scripts/backup/after/post-backup.sh

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+set -e
+
+cd /data
+
+# Remove backed up copy
+rm "$DB_PATH.bak"

helper-scripts/sqlite-scripts/backup/before/pre-backup.sh

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+set -e
+
+cd /data
+
+# Dump the SQLite database
+sqlite3 "$DB_PATH" ".backup $DB_PATH.bak"

helper-scripts/sqlite-scripts/restore/after/post-restore.sh

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+set -e
+
+cd /data
+
+# Restore the backedup database
+mv "$DB_PATH.bak" "$DB_PATH"

helper-scripts/sqlite-scripts/restore/before/pre-restore.sh

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+set -e
+
+# Don't really need to do anything here