fix markdownlint issues

Author: jirfag

README.md

@@ -1,67 +1,83 @@
 [![CircleCI](https://circleci.com/gh/golangci/golangci-worker.svg?style=svg&circle-token=94e0eb37b49bb5f87364a50592794eba13f0d95d)](https://circleci.com/gh/golangci/golangci-worker)
 [![GolangCI](https://golangci.com/badges/github.com/golangci/golangci-worker.svg)](https://golangci.com)
 
-## Worker
+# Worker
+
 This repository contains code of queue worker. Worker runs golangci-lint and reports result to GitHub.
 
 ## Development
+
 ### Technologies
+
 Go (golang), heroku, circleci, docker, redis, postgres.
 
 ### Preparation
+
 In [golangci-api](https://github.com/golangci/golangci-api) repo run:
-```
+
+```bash
 docker-compose up -d
 ```
+
 It runs postgres and redis needed for both api and worker.
 
 ### How to run worker
+
 ```bash
 make run_dev
 ```
 
 ### How to run once on GitHub repo without changing GitHub data: commit status, comments
-```
+
+```bash
 REPO={OWNER/NAME} PR={PULL_REQUEST_NUMBER} make test_repo_fake_github
 ```
 
 e.g. `REPO=golangci/golangci-worker PR=39 make test_repo_fake_github`
 
 ### Configuration
+
 Configurate via `.env` file. Dev `.env` may be like this:
-```
+
+```bash
 REDIS_URL="redis://localhost:6379"
 API_URL="https://api.dev.golangci.com"
 WEB_ROOT="https://dev.golangci.com"
 USE_DOCKER_EXECUTOR=1
 ```
 
 ### Executors
+
 Executor is an abstraction over executing shell commands. In production we use remote shell executor (machine by ssh).
 For local development it's better to use docker executor:
-```
+
+```bash
 docker build -t golangci_executor -f app/docker/executor.dockerfile .
 echo "USE_DOCKER_EXECUTOR=1" >>.env
 ```
 
 ### API
+
 golangci-api is not needed for running and testing golangci-worker. Not running api can just make log warnings like this:
-```
+
+```bash
 level=warning msg="Can't get current state: bad status code 404"
 ```
 
 ### Testing
+
 To run tests:
-```
+
+```bash
 make test
 ```
 
 For more realistic testing than `test_repo_fake_github` use in golangci-api repo GitHub WebHook emulator:
-```
+
+```bash
 go run app/scripts/emulate_webhook/main.go --repo golangci/golangci-worker --pr 39 --sha fbd0d7bada8a6cfa7adbc58e5901e0d66f7f65b1
 ```
 
+## Contributing
 
-# Contributing
 See [CONTRIBUTING](https://github.com/golangci/golangci-worker/blob/master/CONTRIBUTING.md).
-