Fix Docker FromAsCasing Warnings

When running the Stork demo, there are tons of annoying warnings:

 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 109)                                                           0.0s
 => WARN: FromAsCasing: 'as' and 'FROM' keywords' casing do not match (line 155)                                                           0.0s

The fix is easy, and the warnings should go away.