techdocs: remove dockerode dependency

Signed-off-by: Vincenzo Scamporlino <vincenzos@spotify.com>

plugins/techdocs-backend/package.json

@@ -69,7 +69,6 @@
     "@backstage/plugin-search-backend-module-techdocs": "workspace:^",
     "@backstage/plugin-techdocs-node": "workspace:^",
     "@types/express": "^4.17.6",
-    "dockerode": "^4.0.0",
     "express": "^4.17.1",
     "express-promise-router": "^4.1.0",
     "fs-extra": "^11.2.0",
@@ -83,7 +82,6 @@
     "@backstage/backend-defaults": "workspace:^",
     "@backstage/backend-test-utils": "workspace:^",
     "@backstage/cli": "workspace:^",
-    "@types/dockerode": "^3.3.0",
     "msw": "^1.0.0",
     "supertest": "^6.1.3"
   },