feat(docker): add Docker support with configuration files and entrypoint scripts

.env.docker.example

@@ -0,0 +1,55 @@
+# Copy to .env.docker before starting the Docker stack.
+
+# Application URLs
+NEXTAUTH_URL="http://localhost:3000"
+NEXT_PUBLIC_APP_URL="http://localhost:3000"
+AUTH_TRUST_HOST="true"
+
+# Generate a strong random secret before first boot.
+NEXTAUTH_SECRET="replace-with-openssl-rand-base64-32"
+
+# Docker Compose defaults
+POSTGRES_DB="openframe"
+POSTGRES_USER="replace-with-postgres-user"
+POSTGRES_PASSWORD="replace-with-strong-postgres-password"
+DATABASE_URL="postgresql://replace-with-postgres-user:replace-with-strong-postgres-password@postgres:5432/openframe?schema=public"
+NODE_ENV="production"
+
+# Self-host defaults
+OPENFRAME_ENABLE_STRIPE="false"
+OPENFRAME_ENABLE_BUNNY_UPLOADS="false"
+OPENFRAME_REQUIRE_INVITE_CODE="false"
+SELF_HOSTED_AUTO_CREATE_BUCKET="true"
+
+# MinIO-backed S3 storage
+MINIO_ROOT_USER="replace-with-minio-root-user"
+MINIO_ROOT_PASSWORD="replace-with-strong-minio-password"
+R2_ENDPOINT="http://minio:9000"
+R2_PUBLIC_BASE_URL="http://localhost:9000/openframe"
+R2_ACCESS_KEY_ID="replace-with-minio-root-user"
+R2_SECRET_ACCESS_KEY="replace-with-strong-minio-password"
+R2_BUCKET_NAME="openframe"
+
+# Optional auth/admin configuration
+ADMIN_EMAILS=""
+INVITE_CODE=""
+
+# Optional integrations. Leave blank to disable.
+GOOGLE_CLIENT_ID=""
+GOOGLE_CLIENT_SECRET=""
+GITHUB_CLIENT_ID=""
+GITHUB_CLIENT_SECRET=""
+SMTP_HOST=""
+SMTP_PORT="587"
+SMTP_USER=""
+SMTP_PASSWORD=""
+SMTP_FROM=""
+TELEGRAM_BOT_TOKEN=""
+STRIPE_SECRET_KEY=""
+STRIPE_PRICE_ID=""
+STRIPE_WEBHOOK_SECRET=""
+BUNNY_STREAM_API_KEY=""
+BUNNY_STREAM_LIBRARY_ID=""
+BUNNY_API_KEY=""
+BUNNY_CDN_URL=""
+NEXT_PUBLIC_BUNNY_CDN_URL=""