Update Dockerfile

Dockerfile

@@ -33,12 +33,6 @@ while ! nc -z db 5432; do\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\