Too many to pot up, but you can heel them in outdoors if you have some workable soil. Make a long slit in the ground, to the depth of the roots, and spread the strawberry plants in a close-together row, making sure their roots have enough depth that they are not folded back. Water thoroughly to make sure the soil is in firm contact with the roots, press with your heel possibly, then leave them to get on with it. If you are worried about them in severe weather you could cover them with horticultural fleece or straw, but they should be hardy (depends on where you sourced them - field grown or from greenhouses)
Plant them out in their permanent positions as soon as your soil is workable. You could plant some up in your greenhouse borders for an early crop, but they will need bees to pollinate the flowers, or you have to do it with a small soft brush.