chore: Update devcontainer definition

This commit does two things:

- Removes `module-deps` as an NPM dependency, since we no longer
  need/use it.
- Adds `protobuf-compiler` as an Apt dependency, since we need it to
  build our gRPC server definition.

Signed-off-by: Andrew Lilley Brinker <[email protected]>

.devcontainer/devcontainer.json

@@ -8,7 +8,6 @@
     "ghcr.io/devcontainers/features/node:1": {}
   },
   "postCreateCommand": {
-    "module-deps": "npm install -g [email protected] --no-audit --no-fund",
-    "openssl": "sudo apt-get install libssl-dev"
+    "openssl": "sudo apt-get install libssl-dev protobuf-compiler"
   }
 }