fix(docker): build harness/computeragent-server with surfaced install… #4

Job	Run time
build (agentos-server, packages/agentos-server/Dockerfile)	22s
build (harness-server, examples/Dockerfile.harness, examples/harness-server.ts, harness)	31s
build (computeragent-server, examples/Dockerfile.harness, examples/computeragent-server.ts, harness)	41s
build (agentos-spa, agentos/Dockerfile, spa)	19s
	1m 53s

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