add README

README.md

@@ -0,0 +1,42 @@
+# digitalocean_dyndns
+
+Forked from [dc25/digitalocean_dyndns](https://github.com/dc25/digitalocean_dyndns).
+
+This script automatically keeps your DNS records for a HTTPS website working
+when you're hosting from a network with a dynamically allocated IP address, such
+as a typical home network.
+
+To use this script, first mark the shell files as runnable:
+
+```sh
+chmod +x ./dyndns.sh
+chmod +x ./get_ip_addr.sh
+```
+
+Then to set things up, first write your domain name, e.g. `example.com`, to
+`DIGITALOCEAN_DOMAIN`. Secondly, go to your DigitalOcean account and generate a
+Personal Access Token with scopes for creating, reading, and deleting domains.
+Write this to `DIGITALOCEAN_TOKEN`.
+
+The script should now run. Try it out:
+
+```sh
+./dyndns.sh
+```
+
+Go to the control panel in DigitalOcean for your domain, and check the A and
+AAAA records are what you expect. If they are, the next step is to get this
+script to run regularly.
+
+You could do this in a number of ways. Probably the easiest is with crontab.
+Run `crontab -e` to open your crontab for editing, and add these two lines:
+
+```cron
+* *  * * *   /home/.../dyndns.sh 4 > /tmp/dyndns.sh.4.log 2>&1
+* *  * * *   /home/.../dyndns.sh 6 > /tmp/dyndns.sh.6.log 2>&1
+```
+
+Wait one minute, and check the logs. If you want to see that it works, delete
+the REPEAT_CHECK_A and REPEAT_CHECK_AAAA files and wait for the script to run
+again. You may also want to have an MTA set up, as cron will try to send any
+unhandled output to your inbox.