This adds a readiness probe, such that future breakage would be
detected in CI. It also fixes build caching.
Fixescertusone/wormhole#378
Change-Id: I4e929b491bba62b893eec9975f477256eecde6aa
- update buf to latest to support ts-proto plugin
- add NodeJS dev dependency for web-proto codegen
Change-Id: I881f9da7461d5d4ff28a64304a2adc33037598d1