ci: add pre-commit hook and fix linting issues (#545)

* style: deactivate PLC0415 only on part that it's ok

+ re-run pre-commit run --all

* ci: add pre-commit hook

* build: move from yarn to pnpm

* build: move from yarn to pnpm

* build: fix node-version

* ci: install pnpm prior node (?)

* build: update deps and pnpm trying to fix vercel build

* feat: docker www corepack

* style: pre-commit

---------

Co-authored-by: Igor Loskutov <igor.loskutoff@gmail.com>

README.md

@@ -79,7 +79,7 @@ Start with `cd www`.
 **Installation**
 
 ```bash
-yarn install
+pnpm install
 cp .env_template .env
 cp config-template.ts config.ts
 ```
@@ -89,7 +89,7 @@ Then, fill in the environment variables in `.env` and the configuration in `conf
 **Run in development mode**
 
 ```bash
-yarn dev
+pnpm dev
 ```
 
 Then (after completing server setup and starting it) open [http://localhost:3000](http://localhost:3000) to view it in the browser.
@@ -99,7 +99,7 @@ Then (after completing server setup and starting it) open [http://localhost:3000
 To generate the TypeScript files from the openapi.json file, make sure the python server is running, then run:
 
 ```bash
-yarn openapi
+pnpm openapi
 ```
 
 ### Backend