🎉(all) bootstrap the Calendars project

This repository was forked from Drive in late December 2025 and
boostraped as a minimal demo of backend+caldav server+frontend
integration. There is much left to do and to fix!

docker/postgresql/init-databases.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+# Initialize shared calendars database for local development
+# All services (Django, DAViCal, Keycloak) use the same database in public schema
+# This script runs as POSTGRES_USER on first database initialization
+
+set -e
+
+echo "Initializing calendars database..."
+
+# Ensure pgroot user exists with correct password and permissions
+# This runs as POSTGRES_USER (which may be different from pgroot on existing databases)
+psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+    -- Ensure pgroot user exists with correct password
+    -- POSTGRES_USER has superuser privileges, so it can create users
+    DO \$\$
+    BEGIN
+        IF NOT EXISTS (SELECT FROM pg_catalog.pg_roles WHERE rolname = 'pgroot') THEN
+            CREATE USER pgroot WITH PASSWORD 'pass' SUPERUSER CREATEDB CREATEROLE;
+        ELSE
+            ALTER USER pgroot WITH PASSWORD 'pass';
+            -- Ensure superuser privileges
+            ALTER USER pgroot WITH SUPERUSER CREATEDB CREATEROLE;
+        END IF;
+    END
+    \$\$;
+    
+    -- Grant all privileges on calendars database
+    GRANT ALL PRIVILEGES ON DATABASE "$POSTGRES_DB" TO pgroot;
+    
+    -- Grant all on public schema
+    GRANT ALL ON SCHEMA public TO pgroot;
+    ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO pgroot;
+    ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON SEQUENCES TO pgroot;
+EOSQL
+
+echo "Calendars database ready!"