Add Forestry.io configuration (#10925)

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## Description

<!-- Write a brief description of the changes introduced by this PR -->
This adds front matter template configuration files and other configuration required for Forestry.io.

.forestry/front_matter/templates/blog.yml

@@ -0,0 +1,35 @@
+---
+label: blog
+hide_body: false
+is_partial: false
+fields:
+- name: title
+  label: Title
+  type: text
+  hidden: false
+  default: ''
+- name: date
+  label: Date
+  type: datetime
+  hidden: false
+  default: ''
+- name: author
+  label: Author
+  type: text
+  hidden: false
+  default: ''
+- name: tags
+  label: Tags
+  type: tag_list
+  hidden: false
+  default: ''
+- name: image
+  label: Image
+  type: file
+  hidden: false
+  default: ''
+- name: showImageInArticle
+  label: 'Show Image? '
+  type: boolean
+  hidden: false
+  default: ''

.forestry/front_matter/templates/docs.yml

@@ -0,0 +1,8 @@
+---
+label: Docs
+hide_body: false
+is_partial: false
+fields:
+- type: text
+  name: title
+  label: Title

.forestry/settings.yml

@@ -0,0 +1,42 @@
+---
+new_page_extension: md
+auto_deploy: false
+admin_path: 
+webhook_url: 
+sections:
+- type: heading
+  label: Content
+- type: directory
+  path: docs/blog
+  label: Blog Posts
+  create: all
+  match: "**/*.md"
+  templates:
+  - blog
+- type: directory
+  path: docs/docs
+  label: Docs
+  create: all
+  match: "**/*.md"
+  templates:
+  - making-a-site-with-user-authentication
+- type: document
+  path: docs/blog/author.yaml
+  label: Authors
+- type: document
+  path: docs/sites.yml
+  label: Featured Sites
+- type: document
+  path: docs/starters.yml
+  label: Starters
+upload_dir: www/src/uploads
+public_path: "/src/uploads"
+front_matter_path: ''
+use_front_matter_path: false
+file_template: ":filename:"
+custom_preview: true
+build:
+  preview_command: npm run forestry:preview
+  preview_env:
+  - BUILD_DIR=www/
+  output_directory: www/public

www/package.json

@@ -39,6 +39,7 @@
     "gatsby-remark-copy-linked-files": "^2.0.5",
     "gatsby-remark-graphviz": "^1.0.0",
     "gatsby-remark-images": "^2.0.1",
+    "gatsby-remark-normalize-paths": "^1.0.0",
     "gatsby-remark-prismjs": "^3.0.2",
     "gatsby-remark-responsive-iframe": "^2.0.5",
     "gatsby-remark-smartypants": "^2.0.5",
@@ -96,7 +97,8 @@
     "serve": "gatsby serve",
     "test": "echo \"Error: no test specified\" && exit 1",
     "scrapeStarters": "cd src/data/StarterShowcase && node scraper.js",
-    "stylelint": "stylelint './src/**/*.js'"
+    "stylelint": "stylelint './src/**/*.js'",
+    "forestry:preview": "gatsby develop -p 8080 -H 0.0.0.0"
   },
   "devDependencies": {
     "front-matter": "^2.3.0",