docs: improve integrations and install pages (#4719)

Author: ldez

docs/src/docs/welcome/annotations.png

@@ -6,25 +6,28 @@ title: "Install"
 
 Most installations of `golangci-lint` are performed for CI.
 
+It's important to have reproducible CI: don't start to fail all builds at the same time.
+With golangci-lint this can happen if you use option `--enable-all` and a new linter is added
+or even without `--enable-all` when one upstream linter is upgraded.
+
+**IMPORTANT**: It's highly recommended installing a specific version of golangci-lint available on the [releases page](https://github.com/golangci/golangci-lint/releases).
+
 ### GitHub Actions
 
 We recommend using [our GitHub Action](https://github.com/golangci/golangci-lint-action) for running `golangci-lint` in CI for GitHub projects.
+
 It's [fast and uses smart caching](https://github.com/golangci/golangci-lint-action#performance) inside,
 and it can be much faster than the simple binary installation.
 
-Also, the action creates GitHub annotations for found issues: you don't need to dig into build log to see found by `golangci-lint` issues:
+![Log output of the action](./colored-line-number.png)
+
+Also, the action creates GitHub annotations for found issues (you don't need to dig into build log to see found by `golangci-lint` issues):
 
 ![GitHub annotations of the action](./annotations.png)
 
 ### Other CI
 
-It's important to have reproducible CI: don't start to fail all builds at the same time.
-With golangci-lint this can happen if you use option `--enable-all` and a new linter is added
-or even without `--enable-all` when one upstream linter is upgraded.
-
-**IMPORTANT**: It's highly recommended installing a specific version of golangci-lint available on the [releases page](https://github.com/golangci/golangci-lint/releases).
-
-Here is the recommended way to install golangci-lint {.LatestVersion}:
+Here is the other way to install golangci-lint:
 
 ```sh
 # binary will be $(go env GOPATH)/bin/golangci-lint
@@ -55,23 +58,11 @@ golangci-lint --version
 
 On Windows, you can run the above commands with Git Bash, which comes with [Git for Windows](https://git-scm.com/download/win).
 
-### Docker
-
-```sh
-docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:{.LatestVersion} golangci-lint run -v
-```
-
-Preserving cache between consecutive runs:
-```sh
-docker run --rm -v $(pwd):/app -v ~/.cache/golangci-lint/{.LatestVersion}:/root/.cache -w /app golangci/golangci-lint:{.LatestVersion} golangci-lint run -v
-```
+### Linux
 
-Colored output:
-```sh
-docker run -t --rm -v $(pwd):/app -w /app golangci/golangci-lint:{.LatestVersion} golangci-lint run -v
-```
+Golangci-lint is available inside the majority of the package managers.
 
-### macOS
+### MacOS
 
 #### Brew
 
@@ -123,6 +114,22 @@ scoop install main/golangci-lint
 
 The scoop package is not officially maintained by golangci team.
 
+### Docker
+
+```sh
+docker run --rm -v $(pwd):/app -w /app golangci/golangci-lint:{.LatestVersion} golangci-lint run -v
+```
+
+Preserving cache between consecutive runs:
+```sh
+docker run --rm -v $(pwd):/app -v ~/.cache/golangci-lint/{.LatestVersion}:/root/.cache -w /app golangci/golangci-lint:{.LatestVersion} golangci-lint run -v
+```
+
+Colored output:
+```sh
+docker run -t --rm -v $(pwd):/app -w /app golangci/golangci-lint:{.LatestVersion} golangci-lint run -v
+```
+
 ### Install from Source
 
 Note: such `go install`/`go get` installation aren't guaranteed to work. We recommend using binary installation.

docs/src/docs/welcome/colored-line-number.png

@@ -26,7 +26,7 @@ There is a [plugin](https://github.com/SublimeLinter/SublimeLinter-golangcilint)
 
 How to configure:
 
-- Install [plugin](https://plugins.jetbrains.com/plugin/12496-go-linter)
+- Install [plugin](https://plugins.jetbrains.com/plugin/12496-go-linter).
 - Add [File Watcher](https://www.jetbrains.com/help/go/settings-tools-file-watchers.html) using existing `golangci-lint` template.
 - If your version of GoLand does not have the `golangci-lint` [File Watcher](https://www.jetbrains.com/help/go/settings-tools-file-watchers.html) template you can configure your own and use arguments `run --disable=typecheck $FileDir$`.
 
@@ -35,15 +35,18 @@ How to configure:
 There are available plugins:
 
 - [Spacemacs](https://github.com/syl20bnr/spacemacs/blob/develop/layers/+lang/go/README.org#linting)
-- [flycheck checker](https://github.com/weijiangan/flycheck-golangci-lint).
+- [Flycheck checker](https://github.com/weijiangan/flycheck-golangci-lint)
 
 ### Vim
 
 The following plugins support `golangci-lint`:
 
-- [vim-go](https://github.com/fatih/vim-go);
-- [ALE](https://github.com/w0rp/ale);
-- [Syntastic](https://github.com/vim-syntastic/syntastic).
+- [vim-go](https://github.com/fatih/vim-go)
+- [ALE](https://github.com/w0rp/ale)
+
+### LSP Server
+
+- [golangci-lint-langserver](https://github.com/nametake/golangci-lint-langserver) (NeoVim, Vim, Emacs, ...)
 
 ## Shell Completion