Update Postgres version and SimpleLogin mail env

Bump PostgreSQL target from 16 to 17 in discourse-install.sh and make pg_hba.conf lookup dynamic (uses find) instead of a hardcoded path, ensuring compatibility with systems where the data directory path differs. Also add EMAIL_SERVERS_WITH_PRIORITY and POSTFIX_SERVER entries to the SimpleLogin .env to configure local mail delivery (set to localhost).

install/discourse-install.sh

@@ -29,13 +29,13 @@ $STD apt install -y \
   redis-server
 msg_ok "Installed Dependencies"
 
-PG_VERSION="16" PG_MODULES="pgvector" setup_postgresql
+PG_VERSION="17" PG_MODULES="pgvector" setup_postgresql
 NODE_VERSION="22" setup_nodejs
 RUBY_VERSION="3.4.4" setup_ruby
 
 msg_info "Configuring PostgreSQL for Discourse"
 DISCOURSE_DB_PASS=$(openssl rand -base64 18 | tr -dc 'a-zA-Z0-9' | head -c13)
-PG_HBA="/etc/postgresql/16/main/pg_hba.conf"
+PG_HBA=$(find /etc/postgresql -name pg_hba.conf 2>/dev/null | head -n1)
 sed -i 's/^local\s\+all\s\+all\s\+peer$/local   all             all                                     md5/' "$PG_HBA"
 $STD systemctl restart postgresql
 PG_DB_NAME="discourse" PG_DB_USER="discourse" PG_DB_PASS="$DISCOURSE_DB_PASS" setup_postgresql_db

install/simplelogin-install.sh

@@ -76,6 +76,8 @@ cat <<EOF >/opt/simplelogin/.env
 URL=http://${LOCAL_IP}
 EMAIL_DOMAIN=example.com
 SUPPORT_EMAIL=support@example.com
+EMAIL_SERVERS_WITH_PRIORITY=[(10, "localhost.")]
+POSTFIX_SERVER=localhost
 DB_URI=postgresql://${PG_DB_USER}:${PG_DB_PASS}@localhost/${PG_DB_NAME}
 FLASK_SECRET=${FLASK_SECRET}
 DKIM_PRIVATE_KEY_PATH=/opt/simplelogin/dkim/dkim.private