Add Docker docs/howto
Add Docker docs/howto

jeroendesloovere/forkcms,sumocoders/forkcms,bartdc/forkcms,justcarakas/forkcms,Katrienvh/forkcms,jessedobbelaere/forkcms,forkcms/forkcms,jonasdekeukelaere/forkcms,riadvice/forkcms,carakas/forkcms,justcarakas/forkcms,jonasdekeukelaere/forkcms,carakas/forkcms,sumocoders/forkcms,sumocoders/forkcms,bartdc/forkcms,jessedobbelaere/forkcms,bartdc/forkcms,Katrienvh/forkcms,riadvice/forkcms,Katrienvh/forkcms,sumocoders/forkcms,jonasdekeukelaere/forkcms,jeroendesloovere/forkcms,jonasdekeukelaere/forkcms,jeroendesloovere/forkcms,forkcms/forkcms,justcarakas/forkcms,jacob-v-dam/forkcms,riadvice/forkcms,jessedobbelaere/forkcms,carakas/forkcms,forkcms/forkcms,jacob-v-dam/forkcms,riadvice/forkcms,jacob-v-dam/forkcms,jonasdekeukelaere/forkcms,sumocoders/forkcms,jessedobbelaere/forkcms,forkcms/forkcms,Katrienvh/forkcms,jacob-v-dam/forkcms,jeroendesloovere/forkcms,carakas/forkcms,carakas/forkcms