Add super-linter + fix lint issues (#650)

* feat: bump `golangci-lint`, add `super-linter`, replace outdated linter

Bump `golangci-lint` version.
Add `super-linter` to lint other languages.
Go linter is disabled because it's currently broken:
https://github.com/github/super-linter/pull/370
Replacing `scopelint` with `exportloopref`: "[runner] The linter
'scopelint' is deprecated (since v1.39.0) due to: The repository of the
linter has been deprecated by the owner.  Replaced by exportloopref."
Fixed formatting in `.golangci.yml`
Add addtional linters:
  `misspell`: purely style, detects typos in comments
  `whitespace`: detects leading and trailing whitespace
  `goimports`: it's gofmt + checks unused imports

* fix: lint/fix `go` files

* fix: lint with `standardjs`

* fix: lint/fix with `markdownlint`, make template more verbose

* feat: add lint stuff to makefile

* fix: `UseGitIgnore` formatting

* fix: lint/fix `README.md`

Co-authored-by: Casey Lee <cplee@nektos.com>

.github/ISSUE_TEMPLATE/issue_template.md

@@ -1,20 +1,23 @@
 ---
 name: Issue
 about: Use this template for reporting a bug/issue.
-title: "Issue: "
+title: "Issue: <shortly describe issue>"
 labels: kind/bug
 assignees: ''
 ---
 
 <!--
-- Make sure you are able to reproduce it on the [latest version](https://github.com/nektos/act/releases)
-- Search the existing issues.
-- Refer to [README](https://github.com/nektos/act/blob/master/README.md).
+    - Make sure you are able to reproduce it on the [latest version](https://github.com/nektos/act/releases)
+    - Search the existing issues.
+    - Refer to [README](https://github.com/nektos/act/blob/master/README.md).
 -->
 
 ## Act version
 
-<!-- Paste output of `act --version` -->
+<!--
+    - Paste output of `act --version` inside the code block below
+    - If you've built `act` yourself, please provide commit hash
+-->
 
 ```none
 
@@ -22,14 +25,23 @@ assignees: ''
 
 ## Expected behaviour
 
-<!-- Describe how whole process should go and finish -->
+<!--
+    - Describe how whole process should go and finish
+-->
 
 ## Actual behaviour
 
-<!-- Describe what happened -->
+<!--
+    - Describe the issue
+-->
 
 ## Workflow and/or repository
 
+<!--
+    - Provide workflow with which we can reproduce the issue
+      OR
+    - Provide link to your GitHub repository that contains the workflow
+
 <details>
   <summary>workflow</summary>
 
@@ -47,23 +59,23 @@ jobs:
 ## Steps to reproduce
 
 <!--
-Make sure to include command you used to run `act`
-e.g.:
-1. Clone example repo (https://github.com/cplee/github-actions-demo)
-2. Enter cloned repo directory
-3. Run `act -s SUPER_SECRET=im-a-value`
+    - Make sure to include full command with parameters you used to run `act`, example:
+      1. Clone example repo (https://github.com/cplee/github-actions-demo)
+      2. Enter cloned repo directory
+      3. Run `act -s SUPER_SECRET=im-a-value`
 -->
 
-
 ## `act` output
 
-<!-- Paste output from your terminal, use `-v` or `--verbose` for richer output -->
+<!--
+    - Use `act` with `-v`/`--verbose` and paste output from your terminal in code block below
+-->
 
 <details>
   <summary>Log</summary>
 
 ```none
-
+PASTE YOUR LOG HERE
 ```
 
 </details>

.github/linters/.golangci.yml

@@ -0,0 +1 @@
+../../.golangci.yml

.github/linters/.markdown-lint.yml

@@ -0,0 +1,11 @@
+# Default state for all rules
+default: true
+
+# MD013/line-length - Line length
+MD013: false
+
+# MD033/no-inline-html - Inline HTML
+MD033: false
+
+# MD041/first-line-heading/first-line-h1 - First line in a file should be a top-level heading
+MD041: false

.github/workflows/push.yml

@@ -7,6 +7,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
       - uses: actions/setup-go@v1
         with:
           go-version: 1.16
@@ -14,7 +16,19 @@ jobs:
         env:
           CGO_ENABLED: 0
         with:
-          version: v1.32.2
+          version: v1.39.0
+      - uses: github/super-linter@v3
+        env:
+          DEFAULT_BRANCH: master
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          FILTER_REGEX_EXCLUDE: .*testdata/*
+          VALIDATE_ALL_CODEBASE: ${{ github.event_name != 'pull_request' }} # lint only new changes when pull_request
+          VALIDATE_BASH: false
+          VALIDATE_DOCKERFILE: false
+          VALIDATE_DOCKERFILE_HADOLINT: false
+          VALIDATE_GO: false # it's broken, see commit message
+          VALIDATE_JSCPD: false
+          VALIDATE_SHELL_SHFMT: false
 
   test:
     name: Test on Linux