Update Dockerfile

Dockerfile

@@ -14,15 +14,15 @@ RUN apt-get update \
  && rm -rf /var/lib/apt/lists/*
 
 # Configure MariaDB to listen only locally
-RUN printf "%s
-" \
-  "[mysqld]" \
-  "bind-address=127.0.0.1" \
-  "skip-name-resolve" \
-  "character-set-server=utf8mb4" \
-  "collation-server=utf8mb4_general_ci" \
-  "innodb_file_per_table=1" \
-  > /etc/mysql/mariadb.conf.d/99-hf-space.cnf
+# Note: use a simple block to avoid Docker line-continuation issues (a trailing space after "\" breaks builds)
+RUN { \
+  echo "[mysqld]"; \
+  echo "bind-address=127.0.0.1"; \
+  echo "skip-name-resolve"; \
+  echo "character-set-server=utf8mb4"; \
+  echo "collation-server=utf8mb4_general_ci"; \
+  echo "innodb_file_per_table=1"; \
+} > /etc/mysql/mariadb.conf.d/99-hf-space.cnf
 
 # Startup script that launches MariaDB and then Nextcloud
 COPY start.sh /start.sh