Add preliminary DigitalOcean DNS support

.env.sample

@@ -46,6 +46,11 @@ COMPOSE_FILE="compose.yml"
 #GANDI_ENABLED=1
 #SECRET_GANDIV5_API_KEY_VERSION=v1
 
+## DigitalOcean, https://digitalocean.com
+#COMPOSE_FILE="$COMPOSE_FILE:compose.digitalocean.yml"
+#DIGITALOCEAN_ENABLED=1
+#SECRET_DIGITALOCEAN_AUTH_TOKEN_VERSION=v1
+
 #####################################################################
 # Manual wildcard certificate insertion                             #
 #####################################################################

abra.sh

@@ -1,3 +1,3 @@
-export TRAEFIK_YML_VERSION=v19
-export FILE_PROVIDER_YML_VERSION=v9
-export ENTRYPOINT_VERSION=v2
+export TRAEFIK_YML_VERSION=v20
+export FILE_PROVIDER_YML_VERSION=v10
+export ENTRYPOINT_VERSION=v3

compose.digitalocean.yml

@@ -0,0 +1,15 @@
+version: "3.8"
+
+services:
+  app:
+    environment:
+      - DO_AUTH_TOKEN_FILE=/run/secrets/digitalocean_auth_token
+      - LETS_ENCRYPT_DNS_CHALLENGE_ENABLED
+      - LETS_ENCRYPT_DNS_CHALLENGE_PROVIDER
+    secrets:
+      - digitalocean_auth_token
+
+secrets:
+  digitalocean_auth_token:
+    name: ${STACK_NAME}_digitalocean_auth_token_${SECRET_DIGITALOCEAN_AUTH_TOKEN_VERSION}
+    external: true

entrypoint.sh.tmpl

@@ -11,4 +11,8 @@ export OVH_APPLICATION_SECRET=$(cat "$OVH_APPLICATION_SECRET_FILE")
 export GANDIV5_API_KEY=$(cat "$GANDIV5_API_KEY_FILE")
 {{ end }}
 
+{{ if eq (env "DIGITALOCEAN_ENABLED") "1" }}
+export DO_AUTH_TOKEN=$(cat "$DO_AUTH_TOKEN_FILE")
+{{ end }}
+
 /entrypoint.sh "$@"