diff --git a/Dockerfile b/Dockerfile
index 222d8f7..7f1629e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,27 +29,27 @@ RUN mkdir -p /data/rooms && \
     chown -R celery:celery /app
 
 # Create and set up startup script
-RUN printf '#!/bin/bash\n\
-echo "Waiting for database..."\n\
-while ! nc -z db 5432; do\n\
-  sleep 0.1\n\
-done\n\
-echo "Database is ready!"\n\
-\n\
-echo "Waiting for Redis..."\n\
-while ! nc -z redis 6379; do\n\
-  sleep 0.1\n\
-done\n\
-echo "Redis is ready!"\n\
-\n\
-echo "Running database migrations..."\n\
-flask db upgrade\n\
-\n\
-echo "Creating admin user..."\n\
-flask create-admin\n\
-\n\
-echo "Starting application..."\n\
-exec "$@"\n' > /app/start.sh && \
+RUN echo '#!/bin/bash' > /app/start.sh && \
+    echo 'echo "Waiting for database..."' >> /app/start.sh && \
+    echo 'while ! nc -z db 5432; do' >> /app/start.sh && \
+    echo '  sleep 0.1' >> /app/start.sh && \
+    echo 'done' >> /app/start.sh && \
+    echo 'echo "Database is ready!"' >> /app/start.sh && \
+    echo '' >> /app/start.sh && \
+    echo 'echo "Waiting for Redis..."' >> /app/start.sh && \
+    echo 'while ! nc -z redis 6379; do' >> /app/start.sh && \
+    echo '  sleep 0.1' >> /app/start.sh && \
+    echo 'done' >> /app/start.sh && \
+    echo 'echo "Redis is ready!"' >> /app/start.sh && \
+    echo '' >> /app/start.sh && \
+    echo 'echo "Running database migrations..."' >> /app/start.sh && \
+    echo 'flask db upgrade' >> /app/start.sh && \
+    echo '' >> /app/start.sh && \
+    echo 'echo "Creating admin user..."' >> /app/start.sh && \
+    echo 'flask create-admin' >> /app/start.sh && \
+    echo '' >> /app/start.sh && \
+    echo 'echo "Starting application..."' >> /app/start.sh && \
+    echo 'exec "$@"' >> /app/start.sh && \
     chmod +x /app/start.sh && \
     chown celery:celery /app/start.sh