Fix #274, Add quotes to env var value in docker.env file so there will be no errors when doing source docker.env if there are variables with spces
Fix #274, Add quotes to env var value in docker.env file so there will be no errors when doing source docker.env if there are variables with spces

nghiant2710/base-images,resin-io-library/base-images,nghiant2710/base-images,resin-io-library/base-images