feat: workflow to verify security using GoSec

[renanbastos93]

I believe that is much important use to verify possible fail security from this project.
It was chosen version >= 1.13.x because Gosec running only greater and equal to 1.13.x because this lib is using go version 1.13

Some examples based on this project running GoSEC

[/home/runner/work/fasthttp/fasthttp/fs.go:934] - G304 (CWE-22): Potential file inclusion via variable (Confidence: HIGH, Severity: MEDIUM)
  > os.Open(dirPath)


[/home/runner/work/fasthttp/fasthttp/prefork/prefork.go:125] - G204 (CWE-78): Subprocess launched with function call as argument or cmd arguments (Confidence: HIGH, Severity: MEDIUM)
  > exec.Command(os.Args[0], append(os.Args[1:], preforkChildFlag)...)


[/home/runner/work/fasthttp/fasthttp/http.go:164] - G304 (CWE-22): Potential file inclusion via variable (Confidence: HIGH, Severity: MEDIUM)
  > os.Open(path)


[/home/runner/work/fasthttp/fasthttp/fs.go:1243] - G304 (CWE-22): Potential file inclusion via variable (Confidence: HIGH, Severity: MEDIUM)
  > os.Open(path)


[/home/runner/work/fasthttp/fasthttp/fs.go:1105] - G304 (CWE-22): Potential file inclusion via variable (Confidence: HIGH, Severity: MEDIUM)
  > os.Open(filePath)


[/home/runner/work/fasthttp/fasthttp/fs.go:1087] - G304 (CWE-22): Potential file inclusion via variable (Confidence: HIGH, Severity: MEDIUM)
  > os.Open(filePath)


[/home/runner/work/fasthttp/fasthttp/client.go:1523] - G402 (CWE-295): TLS InsecureSkipVerify may be true. (Confidence: LOW, Severity: HIGH)
  > InsecureSkipVerify: c.InsecureSkipVerify

[/home/runner/work/fasthttp/fasthttp/fasthttputil/inmemory_listener.go:88] - G104 (CWE-703): Errors unhandled. (Confidence: HIGH, Severity: LOW)
  > cConn.Close()


[/home/runner/work/fasthttp/fasthttp/fasthttputil/pipeconns.go:235] - G104 (CWE-703): Errors unhandled. (Confidence: HIGH, Severity: LOW)
  > c.SetReadDeadline(deadline)


[/home/runner/work/fasthttp/fasthttp/fasthttputil/pipeconns.go:236] - G104 (CWE-703): Errors unhandled. (Confidence: HIGH, Severity: LOW)
  > c.SetWriteDeadline(deadline)


Summary:
   Files: 43
   Lines: 16117
   Nosec: 0
  Issues: 93

More info about it https://github.com/valyala/fasthttp/runs/468076797?check_suite_focus=true

[erikdubbelboer]

Thanks!