added editor config and not using .jsx extensions

.editorconfig

@@ -0,0 +1,26 @@
+# http://editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+indent_style = space
+indent_size = 4
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.hbs]
+insert_final_newline = false
+
+[*.json]
+indent_size = 2
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{yml,yaml}]
+indent_size = 2
+
+[Makefile]
+indent_style = tab

.eslintignore

@@ -0,0 +1 @@
+public/**

gatsby-node.js

@@ -16,7 +16,7 @@ exports.createPages = async ({ graphql, actions }) => {
     }
   `)
 
-    const template = path.resolve("src/templates/post.jsx")
+    const template = path.resolve("src/templates/post.js")
 
     pages.data.allPrismicPost.edges.forEach(edge => {
         createPage({

package.json

@@ -15,7 +15,8 @@
     "gatsby": "^2.0.76",
     "gatsby-source-prismic": "^2.2.0",
     "react": "^16.5.1",
-    "react-dom": "^16.5.1"
+    "react-dom": "^16.5.1",
+    "react-helmet": "^5.2.0"
   },
   "repository": {
     "type": "git",

yarn.lock

@@ -3887,6 +3887,11 @@ execa@^1.0.0:
     signal-exit "^3.0.0"
     strip-eof "^1.0.0"
 
+exenv@^1.2.1:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/exenv/-/exenv-1.2.2.tgz#2ae78e85d9894158670b03d47bec1f03bd91bb9d"
+  integrity sha1-KueOhdmJQVhnCwPUe+wfA72Ru50=
+
 expand-brackets@^0.1.4:
   version "0.1.5"
   resolved "https://registry.yarnpkg.com/expand-brackets/-/expand-brackets-0.1.5.tgz#df07284e342a807cd733ac5af72411e581d1177b"
@@ -7736,7 +7741,7 @@ promise@^7.1.1:
   dependencies:
     asap "~2.0.3"
 
-prop-types@^15.6.1, prop-types@^15.6.2:
+prop-types@^15.5.4, prop-types@^15.6.1, prop-types@^15.6.2:
   version "15.6.2"
   resolved "https://registry.yarnpkg.com/prop-types/-/prop-types-15.6.2.tgz#05d5ca77b4453e985d60fc7ff8c859094a497102"
   integrity sha512-3pboPvLiWD7dkI3qf3KbUe6hKFKa52w+AE0VCqECtf+QHAKgOL37tTaNCnuX1nAAQ4ZhyP+kYVKf8rLmJ/feDQ==
@@ -7942,6 +7947,16 @@ react-error-overlay@^3.0.0:
   resolved "https://registry.yarnpkg.com/react-error-overlay/-/react-error-overlay-3.0.0.tgz#c2bc8f4d91f1375b3dad6d75265d51cd5eeaf655"
   integrity sha512-XzgvowFrwDo6TWcpJ/WTiarb9UI6lhA4PMzS7n1joK3sHfBBBOQHUc0U4u57D6DWO9vHv6lVSWx2Q/Ymfyv4hw==
 
+react-helmet@^5.2.0:
+  version "5.2.0"
+  resolved "https://registry.yarnpkg.com/react-helmet/-/react-helmet-5.2.0.tgz#a81811df21313a6d55c5f058c4aeba5d6f3d97a7"
+  integrity sha1-qBgR3yExOm1VxfBYxK66XW89l6c=
+  dependencies:
+    deep-equal "^1.0.1"
+    object-assign "^4.1.1"
+    prop-types "^15.5.4"
+    react-side-effect "^1.1.0"
+
 react-hot-loader@^4.6.2:
   version "4.6.3"
   resolved "https://registry.yarnpkg.com/react-hot-loader/-/react-hot-loader-4.6.3.tgz#d9c8923c45b35fd51538ba4297081a00be6bccb1"
@@ -7962,6 +7977,14 @@ react-lifecycles-compat@^3.0.4:
   resolved "https://registry.yarnpkg.com/react-lifecycles-compat/-/react-lifecycles-compat-3.0.4.tgz#4f1a273afdfc8f3488a8c516bfda78f872352362"
   integrity sha512-fBASbA6LnOU9dOU2eW7aQ8xmYBSXUIWr+UmF9b1efZBazGNO+rcXT/icdKnYm2pTwcRylVUYwW7H1PHfLekVzA==
 
+react-side-effect@^1.1.0:
+  version "1.1.5"
+  resolved "https://registry.yarnpkg.com/react-side-effect/-/react-side-effect-1.1.5.tgz#f26059e50ed9c626d91d661b9f3c8bb38cd0ff2d"
+  integrity sha512-Z2ZJE4p/jIfvUpiUMRydEVpQRf2f8GMHczT6qLcARmX7QRb28JDBTpnM2g/i5y/p7ZDEXYGHWg0RbhikE+hJRw==
+  dependencies:
+    exenv "^1.2.1"
+    shallowequal "^1.0.1"
+
 react@^16.5.1:
   version "16.7.0"
   resolved "https://registry.yarnpkg.com/react/-/react-16.7.0.tgz#b674ec396b0a5715873b350446f7ea0802ab6381"
@@ -8574,7 +8597,7 @@ shallow-compare@^1.2.2:
   resolved "https://registry.yarnpkg.com/shallow-compare/-/shallow-compare-1.2.2.tgz#fa4794627bf455a47c4f56881d8a6132d581ffdb"
   integrity sha512-LUMFi+RppPlrHzbqmFnINTrazo0lPNwhcgzuAXVVcfy/mqPDrQmHAyz5bvV0gDAuRFrk804V0HpQ6u9sZ0tBeg==
 
-shallowequal@^1.0.2:
+shallowequal@^1.0.1, shallowequal@^1.0.2:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/shallowequal/-/shallowequal-1.1.0.tgz#188d521de95b9087404fd4dcb68b13df0ae4e7f8"
   integrity sha512-y0m1JoUZSlPAjXVtPPW70aZWfIL/dSP7AFkRnniLCrK/8MDKog3TySTBmckD+RObVxH0v4Tox67+F14PdED2oQ==