DEV: Get validator workflow to work (#163)

Apparently the `paths` filter can be unreliable for
`pull_request_target` so let's just remove it.

We can validate the json on every pr. Not a problem.

Author: blake-discourse

.github/workflows/validate_pr.yml

@@ -3,8 +3,6 @@ name: Validate PR Documentation
 on:
   pull_request_target:
     types: [opened, synchronize, reopened]
-    paths:
-      - 'openapi.json'
 
 jobs:
   validate-openapi:

lefthook.yml

@@ -0,0 +1,34 @@
+# EXAMPLE USAGE
+# Refer for explanation to following link:
+# https://github.com/evilmartians/lefthook/blob/master/docs/full_guide.md
+#
+# pre-push:
+#   commands:
+#     packages-audit:
+#       tags: frontend security
+#       run: yarn audit
+#     gems-audit:
+#       tags: backend security
+#       run: bundle audit
+#
+# pre-commit:
+#   parallel: true
+#   commands:
+#     eslint:
+#       glob: "*.{js,ts}"
+#       run: yarn eslint {staged_files}
+#     rubocop:
+#       tags: backend style
+#       glob: "*.rb"
+#       exclude: "application.rb|routes.rb"
+#       run: bundle exec rubocop --force-exclusion {all_files}
+#     govet:
+#       tags: backend style
+#       files: git ls-files -m
+#       glob: "*.go"
+#       run: go vet {files}
+#   scripts:
+#     "hello.js":
+#       runner: node
+#     "any.go":
+#       runner: go run