3.5: Static bundling, WebSocket subscriptions

- Adds WebSocket support to real-time `subscription` queries
- Adds `.env` file for managing environment variables
- Adds `GRAPHQL` variable to `.env`, to specify GraphQL server/endpoint
- Adds `WS_SUBSCRIPTIONS` variable to `.env`, to enable/disable WebSockets
- Adds `npm run static` mode, for building a client-only static bundle
- Adds `src/views/index.html` template for static bundling
- Refactors `src/runner/app.ts` to allow static compilation

.env

@@ -0,0 +1,2 @@
+GRAPHQL=https://graphqlhub.com/graphql
+WS_SUBSCRIPTIONS=0

index.ts

@@ -1,18 +1,16 @@
 // Run the right environment...
 
+// Load env vars, for the `GRAPHQL` endpoint and anything else we need
+require("dotenv").config();
+
 // Catch CTRL/CMD+C interrupts cleanly
 process.on("SIGINT", () => {
   process.exit();
 });
 
 // Build mode?
-let script: string;
-
-if (process.env.npm_lifecycle_event === "build") {
-  script = "build";
-} else {
-  script = process.env.NODE_ENV === "production" ? "production" : "development";
-}
+const script = ["build", "static"].includes(process.env.npm_lifecycle_event!)
+  ? process.env.npm_lifecycle_event! : process.env.NODE_ENV || "development";
 
 // Start the script
 require(`./src/runner/${script}`);