Cache .cargo, and copy output to separate path.

.ci/build

@@ -1,7 +1,12 @@
 #!/bin/bash -e
 set -Eeuo pipefail
 
+echo Using HOME: $HOME
 cd blastmud-repo
 echo Running tests
 cargo test --target-dir ../target --profile release
+echo Running main build
 cargo build --target-dir ../target --profile release
+echo Copying artifacts
+cp ../target/release/blastmud_game ../output/
+cp ../target/release/blastmud_listener ../output/

.concourse.yml

@@ -15,8 +15,9 @@ jobs:
           - name: blastmud-repo
         caches:
           - path: target
+          - path: .cargo
         outputs:
-          - name: target
+          - name: output
         run:
           path: blastmud-repo/.ci/build
 resources: