Switch from envrc → env format

Ref coop-cloud/abra#40

.env.sample

@@ -0,0 +1,19 @@
+APP=nextcloud
+
+DOMAIN=nextcloud.example.com
+## Domain aliases
+#EXTRA_DOMAINS=', `www.nextcloud.example.com`'
+LETS_ENCRYPT_ENV=production
+
+DB_ROOT_PASSWORD_VERSION=v1
+DB_PASSWORD_VERSION=v1
+ADMIN_PASSWORD_VERSION=v1
+
+EXTRA_VOLUME=/dev/null:/tmp/.dummy
+
+## SMTP settings
+#COMPOSE_FILE="compose.yml:compose.mailrelay.yml"
+#SMTP_HOST="postfix_relay_app"
+## Emails are sent from $MAIL_FROM@$MAIL_DOMAIN
+#MAIL_DOMAIN=nextcloud.example.com
+#MAIL_FROM_ADDRESS=nextcloud

.envrc.sample

@@ -1,19 +0,0 @@
-export APP=nextcloud
-
-export DOMAIN=nextcloud.example.com
-## Domain aliases
-#export EXTRA_DOMAINS=', `www.nextcloud.example.com`'
-export LETS_ENCRYPT_ENV=production
-
-export DB_ROOT_PASSWORD_VERSION=v1
-export DB_PASSWORD_VERSION=v1
-export ADMIN_PASSWORD_VERSION=v1
-
-export EXTRA_VOLUME=/dev/null:/tmp/.dummy
-
-## SMTP settings
-#export COMPOSE_FILE="compose.yml:compose.mailrelay.yml"
-#export SMTP_HOST="postfix_relay_app"
-## Emails are sent from $MAIL_FROM@$MAIL_DOMAIN
-#export MAIL_DOMAIN=nextcloud.example.com
-#export MAIL_FROM_ADDRESS=nextcloud