Replace DO stuff with GCP equivalents

Dockerfile

@@ -1,7 +1,7 @@
-FROM certbot/dns-digitalocean:latest
+FROM certbot/dns-google:latest
 
 COPY new-domain /usr/bin/new-domain
 COPY renew /etc/periodic/monthly/renew
 
-ENTRYPOINT /usr/sbin/crond -f
+ENTRYPOINT /usr/sbin/crond -fd0
 

README.md

@@ -1,6 +1,6 @@
-# Certbot DigitalOcean
+# Certbot Google
 
-This container wraps the dns-digitalocean certbot container with an additional
+This container wraps the dns-google certbot container with an additional
 script to help with requesting new domains: [new-domain](./new-domain).
 
 When using, make sure to mount the following folders:
@@ -9,5 +9,5 @@ Mount|Note
 ---|---
 `/etc/letsencrypt`|Used to store requested certs
 `/var/lib/letsencrypt`|Needed by LE
-`/root/digitalocean.ini`|Needed for authentication with DO
+`/root/google-cloud-key.json`|Needed for authentication with GCP
 

new-domain

@@ -1,13 +1,13 @@
 #!/usr/bin/env sh
 
-INI_FILE="/root/digitalocean.ini"
+KEY_FILE="/root/google-cloud-key.json"
 
-if [ ! -f $INI_FILE ]; then
-    echo "ERROR: digitalocean credentials not present at $INI_FILE"
+if [ ! -f $KEY_FILE ]; then
+    echo "ERROR: google cloud credentials not present at $KEY_FILE"
     exit 1
 fi
 
-CMD="certbot certonly --dns-digitalocean --dns-digitalocean-credentials $INI_FILE --dns-digitalocean-propagation-seconds 90"
+CMD="certbot certonly --dns-google --dns-google-credentials $KEY_FILE --dns-google-propagation-seconds 90"
 
 for domain in "$@"; do
     CMD="$CMD -d $domain"