Replace \`service\` by 'service' so it doesn't get executed by bash

[dorianmariecom]

Fixes #694

[djmb]

Thanks for the PR @dorianmariecom.

There's two failing tests:

CliBuildTest#test_pull [test/cli/build_test.rb:60]:
Expected /docker\ inspect\ \-f\ '\{\{\ \.Config\.Labels\.service\ \}\}'\ dhh\/app:999\ \|\ grep\ \-x\ app\ \|\|\ \(echo\ "Image\ dhh\/app:999\ is\ missing\ the\ `service`\ label"\ &&\ exit\ 1\)/ to match "INFO [bcf6aaa0] Running /usr/bin/env mkdir -p .kamal on 1.1.1.1\n  INFO [182f6c28] Running /usr/bin/env mkdir -p .kamal on 1.1.1.4\n  INFO [cd245c5d] Running /usr/bin/env mkdir -p .kamal on 1.1.1.2\n  INFO [f59e183b] Running /usr/bin/env mkdir -p .kamal on 1.1.1.3\nAcquiring the deploy lock...\n  INFO [517a2dab] Running docker image rm --force dhh/app:999 on 1.1.1.3\n  INFO [9f64f594] Running docker pull dhh/app:999 on 1.1.1.3\n  INFO [1571ade6] Running docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1) on 1.1.1.3\n  INFO [f3736078] Running docker image rm --force dhh/app:999 on 1.1.1.4\n  INFO [8b52abd7] Running docker pull dhh/app:999 on 1.1.1.4\n  INFO [16f5ca24] Running docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1) on 1.1.1.4\n  INFO [2776ae73] Running docker image rm --force dhh/app:999 on 1.1.1.2\n  INFO [1831d56c] Running docker pull dhh/app:999 on 1.1.1.2\n  INFO [0d2c51b6] Running docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1) on 1.1.1.2\n  INFO [76c7591d] Running docker image rm --force dhh/app:999 on 1.1.1.1\n  INFO [113e06e9] Running docker pull dhh/app:999 on 1.1.1.1\n  INFO [76199b0a] Running docker inspect -f '{{ .Config.Labels.service }}' dhh/app:999 | grep -x app || (echo \"Image dhh/app:999 is missing the 'service' label\" && exit 1) on 1.1.1.1\nReleasing the deploy lock...".

bin/test /home/runner/work/kamal/kamal/test/cli/build_test.rb:56

and

CommandsBuilderTest#test_validate_image [test/commands/builder_test.rb:115]:
--- expected
+++ actual
@@ -1 +1,3 @@
-"docker inspect -f '{{ .Config.Labels.service }}' dhh/app:123 | grep -x app || (echo \"Image dhh/app:123 is missing the `service` label\" && exit 1)"
+# encoding: US-ASCII
+#    valid: true
+"docker inspect -f '{{ .Config.Labels.service }}' dhh/app:123 | grep -x app || (echo \"Image dhh/app:123 is missing the 'service' label\" && exit 1)"

bin/test /home/runner/work/kamal/kamal/test/commands/builder_test.rb:114

If you could resolve those I'll get this merged.

[dorianmariecom]

Thanks for merging and resolving the tests