prep Dockerfile.dev and package.json for k8s dev with tsx

Install tsx globally in Dockerfile.dev for watch mode, set
NODE_ENV=development. Add tsx as a devDependency in root package.json.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Anmol1696

Dockerfile.dev

@@ -1,6 +1,6 @@
 FROM node:22-alpine
 
-RUN npm install -g pnpm@10.12.2
+RUN npm install -g pnpm@10.12.2 tsx
 
 WORKDIR /usr/src/app
 
@@ -26,4 +26,4 @@ RUN node --experimental-strip-types scripts/generate.ts && pnpm install --frozen
 COPY . .
 RUN pnpm generate && pnpm build
 
-ENV NODE_ENV=production
+ENV NODE_ENV=development

package.json

@@ -41,6 +41,7 @@
     "jest": "^30.2.0",
     "prettier": "^3.7.4",
     "ts-jest": "^29.4.0",
+    "tsx": "^4.19.0",
     "typescript": "^5.1.6",
     "typescript-eslint": "^8.33.0"
   },