Add monthly MongoDB backup script

.gitignore

@@ -8,6 +8,7 @@ lerna-debug.log*
 
 # Dumps
 dump
+backups/
 
 
 # Diagnostic reports (https://nodejs.org/api/report.html)

scripts/monthlyMongoBackup.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+APP_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+BACKUP_ROOT="${BACKUP_ROOT:-$APP_DIR/backups}"
+DB_NAME="${DB_NAME:-EMI_SOCIAL}"
+MONGO_IMAGE="${MONGO_BACKUP_IMAGE:-mongo:7}"
+KEEP_ARCHIVES="${KEEP_ARCHIVES:-12}"
+
+timestamp="$(date -u +%Y%m%dT%H%M%SZ)"
+dump_name="emi_social_${timestamp}"
+archive_path="$BACKUP_ROOT/${dump_name}.tar.gz"
+
+mkdir -p "$BACKUP_ROOT"
+
+docker run --rm \
+  --user "$(id -u):$(id -g)" \
+  --env-file "$APP_DIR/.env" \
+  -e DB_NAME="$DB_NAME" \
+  -e DUMP_NAME="$dump_name" \
+  -v "$BACKUP_ROOT:/backup" \
+  "$MONGO_IMAGE" \
+  bash -lc '
+    set -euo pipefail
+    : "${MONGO_URL:?MONGO_URL is missing}"
+
+    uri="$MONGO_URL"
+    uri="${uri/\/myFirstDatabase?/\/${DB_NAME}?}"
+    uri="${uri/\/myFirstDatabase$/\/${DB_NAME}}"
+
+    mongodump --uri "$uri" --db "$DB_NAME" --out "/backup/$DUMP_NAME"
+  '
+
+tar -czf "$archive_path" -C "$BACKUP_ROOT" "$dump_name"
+rm -rf "$BACKUP_ROOT/$dump_name"
+
+find "$BACKUP_ROOT" -maxdepth 1 -name 'emi_social_*.tar.gz' -type f \
+  -printf '%T@ %p\n' \
+  | sort -rn \
+  | awk -v keep="$KEEP_ARCHIVES" 'NR > keep { print $2 }' \
+  | xargs -r rm -f
+
+echo "Created MongoDB backup: $archive_path"