refactor: slim down the backend containers (#4233)

* refactor: slim down the backend containers

* refactor: make containers run as non-root user in container

* chore: correct casing for the build stage definitions

* chore: remove docker compose version field as its obsolete

* chore: optimise chown and chmod into the COPY command itself

* chore: add package overrides for packages with reported vulns

* chore: add pnpm to containers + set workdir dir to the backend project

* fix: permission issues with the fe containers

* chore: define env variables on AIO

packages/hoppscotch-backend/prod_run.mjs

@@ -39,8 +39,8 @@ const caddyProcess = runChildProcessWithPrefix(
   'App/Admin Dashboard Caddy',
 );
 const backendProcess = runChildProcessWithPrefix(
-  'pnpm',
-  ['run', 'start:prod'],
+  'node',
+  ['/dist/backend/dist/main.js'],
   'Backend Server',
 );