Add docker compose setup for encoder + add pprof config

[dmanc]

Why are these changes needed?

Adds docker compose setup for the encoder. In addition, added pprof endpoint to the encoder server so we can analyze the CPU usage at runtime.

Checks

• [ ] I've made sure the lint is passing in this PR.
• [ ] I've made sure the tests are passing. Note that there might be a few flaky tests, in that case, please comment that they are not relevant.
• Testing Strategy
  • [ ] Unit tests
  • [ ] Integration tests
  • [ ] This PR is not tested :(