remove outdated env vars and fix make_last_user_admin

.env.sample

@@ -24,8 +24,6 @@ NOTIFICATIONS_EMAIL_ADDRESS=noreply@example.com
 # reply-to in email notifications
 REPLY_HOSTNAME=$DOMAIN
 
-# helper bot is the account which welcomes people to their groups.
-HELPER_BOT_EMAIL=noreply@loomio.example.com
 RAILS_ENV=production
 
 # Number of webserver processes and threads

abra.sh

@@ -1,6 +1,8 @@
 export LOOMIO_ENTRYPOINT_VERSION=v5
 
+# cannot be integrated into entrypoint.sh as it requires the operator to create a user first
 function make_last_user_admin()
 {
+    export DATABASE_URL="postgresql://${POSTGRES_USER}:$(cat /run/secrets/db_password)@db/${POSTGRES_DB}"
     SECRET_KEY_BASE=$(rake secret) rails runner "User.last.update(is_admin: true)"
 }

compose.yml

@@ -6,17 +6,18 @@ x-db-env: &db-env
     POSTGRES_DB: loomio_production
     POSTGRES_USER: postgres
 
+x-redis-env: &redis-env
+  REDIS_URL: redis://redis:6379
+
 x-environment: &default-env
   <<: *db-env
-  REDIS_URL: redis://redis:6379
+  <<: *redis-env
   CANONICAL_HOST: ${DOMAIN}
   VIRTUAL_HOST: ${DOMAIN}
   CHANNELS_URI: wss://channels.${DOMAIN}
-  TLD_LENGTH: ${TLD_LENGTH}
   SUPPORT_EMAIL: ${SUPPORT_EMAIL}
   NOTIFICATIONS_EMAIL_ADDRESS: ${NOTIFICATIONS_EMAIL_ADDRESS}
   REPLY_HOSTNAME: ${REPLY_HOSTNAME}
-  HELPER_BOT_EMAIL: ${HELPER_BOT_EMAIL}
   RAILS_ENV: ${RAILS_ENV}
   PUMA_WORKERS: ${PUMA_WORKERS}
   MIN_THREADS: ${MIN_THREADS}
@@ -71,7 +72,7 @@ services:
         - "traefik.http.routers.${STACK_NAME}.entrypoints=web-secure"
         - "traefik.http.routers.${STACK_NAME}.tls.certresolver=${LETS_ENCRYPT_ENV}"
         - "coop-cloud.${STACK_NAME}.version=0.6.0+v2.25.2"
-        - "backupbot.backup=true"
+        - "backupbot.backup:=${ENABLE_BACKUPS:-true}"
   worker:
     image: loomio/loomio:v2.25.2
     configs:
@@ -135,7 +136,7 @@ services:
     depends_on:
       - redis
     environment:
-      - REDIS_URL=redis://redis:6379
+      <<: *redis-env
   cron:
     image: loomio/loomio:v2.25.2
     configs: