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/tsconfig.build.json

@@ -1,4 +1,8 @@
 {
   "extends": "./tsconfig.json",
-  "exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
+  "exclude": ["node_modules", "test", "dist", "**/*spec.ts"],
+  "compilerOptions": {
+    "declaration": false,
+    "sourceMap": false
+  }
 }