🎉(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/files/docker-entrypoint-initdb.d/init-databases.sh

@@ -0,0 +1,46 @@
+#!/bin/bash
+# Initialize multiple databases on the same PostgreSQL server
+# This script runs automatically when the PostgreSQL container starts for the first time
+
+set -e
+set -u
+
+# Function to create a database and user if they don't exist
+create_database() {
+    local database=$1
+    local user=$2
+    local password=$3
+    
+    echo "Creating database '$database' with user '$user'..."
+    
+    psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+        -- Create user if not exists
+        DO \$\$
+        BEGIN
+            IF NOT EXISTS (SELECT FROM pg_catalog.pg_roles WHERE rolname = '$user') THEN
+                CREATE USER $user WITH PASSWORD '$password';
+            END IF;
+        END
+        \$\$;
+        
+        -- Create database if not exists
+        SELECT 'CREATE DATABASE $database OWNER $user'
+        WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '$database')\gexec
+        
+        -- Grant privileges
+        GRANT ALL PRIVILEGES ON DATABASE $database TO $user;
+EOSQL
+
+    echo "Database '$database' created successfully."
+}
+
+# Create databases for all services
+# The main 'calendar' database is created by default via POSTGRES_DB
+
+# DAViCal database
+create_database "davical" "davical" "davical_pass"
+
+# Keycloak database  
+create_database "keycloak" "keycloak" "keycloak_pass"
+
+echo "All databases initialized successfully!"