graphql-http, rewrites, redirects, explorer plugin (#222)

* graphql-http and rewrites and redirects

- replace express with graphql-http, lambda function
- add netlify-cli tooling to simplify npm run watch
- add reverse proxy so that /graphql serves a graphql schema
- add 301 redirects so that /index and /swapi redirect to /graphql
- lint:fix

* upgrade netlify-cli
* upgrade to node 20

Author: acao

.flowconfig

@@ -1,8 +1,7 @@
 [ignore]
 .*/coverage/.*
 .*/scripts/.*
-.*/node_modules/flow-bin/.*
-.*/node_modules/fbjs/.*
+.*/node_modules/.*
 
 [include]
 

.gitignore

@@ -5,3 +5,6 @@ node_modules
 npm-debug.log
 /coverage
 /cache/data.json
+
+# Local Netlify folder
+.netlify

.nvmrc

@@ -0,0 +1 @@
+v20.5.0

handler/graphql.mjs

@@ -0,0 +1,14 @@
+/**
+ * Copyright (c) 2020, GraphQL Contributors
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ *
+ */
+
+import { createHandler } from 'graphql-http/lib/use/@netlify/functions';
+import schema from '../lib/schema';
+
+// Create the GraphQL over HTTP native fetch handler
+export const handler = createHandler({ schema: schema.default });

handler/index.js

@@ -0,0 +1,15 @@
+/**
+ * 301 permanently redirect /index requests to /graphql
+ */
+export const handler = async function(event) {
+  let location = '/graphql';
+  if (event.queryStringParameters) {
+    location += '?' + new URLSearchParams(event.queryStringParameters);
+  }
+  return {
+    statusCode: 301,
+    headers: {
+      Location: location,
+    },
+  };
+};

handler/index.mjs

@@ -0,0 +1,15 @@
+/**
+ * 301 permanently redirect /swapi requests to /graphql
+ */
+export const handler = async function(event) {
+  let location = '/graphql';
+  if (event.queryStringParameters) {
+    location += '?' + new URLSearchParams(event.queryStringParameters);
+  }
+  return {
+    statusCode: 301,
+    headers: {
+      Location: location,
+    },
+  };
+};

handler/swapi.js

@@ -1,3 +1,8 @@
 [build]
-  functions = "netlify-lambda-lib"
+  functions = "handler"
   command = "npm run download && npm run build"
+  publish = "public/"
+[[headers]]
+  for = "/graphql*"
+  [headers.values]
+    Access-Control-Allow-Origin = "*"