Add a command to check if healthchecks exist for a given process type

[josegonzalez]

Closes #117

[dokku-bot]

sh-checker report

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shellcheck errors

``` shellcheck checking is disabled. ```

shfmt errors

``` 'shfmt -l -d -i 2' returned error 1 finding the following formatting issues: ---------- test.bats --- test.bats.orig +++ test.bats @@ -498,7 +498,7 @@ assert_exit_status() { exit_status="$1" if [[ "$status" -ne "$exit_status" ]]; then - { + { echo "expected exit status: $exit_status" echo "actual exit status: $status" } | flunk ---------- You can reformat the above files to meet shfmt's requirements by typing: shfmt -l -d -i 2 -w filename ```