Add ubuntu18_04 image

images/debian.dhall

@@ -417,6 +417,16 @@ let ubuntuImages: List Image.Type =
     , extraPackages = ubuntuBuildDepends
     , withLatestPython = True
     }
+  , DebianImage.toDocker DebianImage::
+    { name = "x86_64-linux-ubuntu18_04"
+    , fromImage = "amd64/ubuntu:18.04"
+    , runnerTags = [ "x86_64-linux" ]
+    , bootstrapLlvm = None Llvm.Source
+    , bootstrapGhc = { version = "9.4.3", triple = "x86_64-deb9-linux" }
+    , llvm = Some (Llvm.Source.FromBindist { version = "11.0.1" , triple = "x86_64-linux-gnu-ubuntu-16.04" })
+    , cabalSource = Cabal.fromUpstreamBindist { version = "3.6.2.0", triple = "x86_64-linux-alpine-static" }
+    , extraPackages = ubuntuBuildDepends
+    }
 ]
 
 let linterImages: List Image.Type =