Tomcat image ENV variable reformat

[Nefarious46]

          Seems to build and run fine.

Notes from local build:

 => WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 8)                                                                                                                                                                    0.0s
 => WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 9)                                                                                                                                                                    0.0s
 => WARN: LegacyKeyValueFormat: "ENV key=value" should be used instead of legacy "ENV key value" format (line 10)                                                                                                                                                                   0.0s

I use bleeding edge versions locally so this isn't that big of a deal for now so approving

Originally posted by @StrongestNumber9 in #87 (review)