Add Dump A Remote Database as a mongo til

mongodb/dump-a-remote-database.md

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+# Dump A Remote Database
+
+Here is a single-line script for dumping a remote mongo database. This will
+dump it to your local filesystem in a binary format (`.bson`) that you can then
+restore to another mongo instance.
+
+Create a file like this called `mongdump-cmd` and replace the various
+placeholder values (e.g. `<HOST>`) with valid values for your remote mongo
+instance.
+
+```bash
+mongodump --host '<HOST>:<PORT>' \
+          --ssl \
+          --username '<USER>' \
+          --password '<PASSWORD>' \
+          --authenticationDatabase 'admin' \
+          --out ./mongo-backups/<DATE>-dump
+```
+
+Create the backup directory:
+
+```bash
+$ mkdir mongo-backups
+```
+
+Then execute the bash script:
+
+```bash
+$ bash mongodump-cmd
+```
+
+This will dump everything on the remote instance into the
+`mongo-backups/2020-06-20-dump/` directory. You can also include the `--db`
+flag to dump a specific database.
+
+This can later be used with `mongoresetore` to restore the data to the mongo
+instance you specify.