feat(backend): init aris-backend with Hono

- Add apps/aris-backend package with Hono server
- Add /health endpoint
- Add backend-spec.md with design decisions

Co-authored-by: Ona <no-reply@ona.com>

apps/aris-backend/package.json

@@ -0,0 +1,19 @@
+{
+	"name": "@aris/backend",
+	"version": "0.0.0",
+	"type": "module",
+	"main": "src/index.ts",
+	"scripts": {
+		"dev": "bun run --watch src/index.ts",
+		"start": "bun run src/index.ts",
+		"test": "bun test src/"
+	},
+	"dependencies": {
+		"@aris/core": "workspace:*",
+		"@aris/source-location": "workspace:*",
+		"@aris/source-weatherkit": "workspace:*",
+		"better-auth": "^1",
+		"hono": "^4",
+		"postgres": "^3"
+	}
+}

apps/aris-backend/src/index.ts

@@ -0,0 +1,10 @@
+import { Hono } from "hono"
+
+const app = new Hono()
+
+app.get("/health", (c) => c.json({ status: "ok" }))
+
+export default {
+	port: 3000,
+	fetch: app.fetch,
+}

apps/aris-backend/tsconfig.json

@@ -0,0 +1,7 @@
+{
+	"extends": "../../tsconfig.json",
+	"compilerOptions": {
+		"types": ["bun-types"]
+	},
+	"include": ["src"]
+}