add trivy parser (#981)

* add trivy parser

* fix test

* format

* add title and summary

* add trivy parse command

* add uploader

* set args by env

* add README

* add err check

* fix

* fix

* fix

* fix test

* update trivy

* refactor

* delete require uuid

* delete uuid from trivy parser

Co-authored-by: Kota Kanbe <kotakanbe@gmail.com>

contrib/trivy/README.md

@@ -0,0 +1,35 @@
+# trivy-to-vuls
+
+## Main Features
+
+- convert trivy's results json to vuls's report json
+
+## Installation
+
+```
+git clone https://github.com/future-architect/vuls.git
+make build-trivy-to-vuls
+```
+
+## Command Reference
+
+```
+Parse trivy json to vuls results
+
+Usage:
+  trivy-to-vuls parse [flags]
+
+Flags:
+  -h, --help                          help for parse
+  -s, --stdin                         input from stdin
+  -d, --trivy-json-dir string         trivy json dir (default "./")
+  -f, --trivy-json-file-name string   trivy json file name (default "results.json")
+```
+
+## Usage
+
+- use trivy output
+
+```
+ trivy -q image -f=json python:3.4-alpine | trivy-to-vuls parse --stdin
+```