Switch to Dockerfile for Railway deployment

Nixpacks doesn't support Node 22.12+ required by Prisma 7.1.0.
Using Dockerfile with node:24-alpine for precise version control.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: pktikkani

Dockerfile

@@ -0,0 +1,22 @@
+FROM node:24-alpine
+
+WORKDIR /app
+
+# Copy package files
+COPY package*.json ./
+COPY prisma ./prisma/
+
+# Install dependencies
+RUN npm ci
+
+# Copy source code
+COPY . .
+
+# Build
+RUN npm run build
+
+# Expose port
+EXPOSE 3000
+
+# Start
+CMD ["npm", "run", "start"]

nixpacks.toml

@@ -1,5 +1,8 @@
+[variables]
+NIXPACKS_NODE_VERSION = "22"
+
 [phases.setup]
-nixPkgs = ["nodejs"]
+nixPkgs = ["nodejs@22"]
 
 [phases.install]
 cmds = ["npm ci"]

railway.json

@@ -1,9 +1,8 @@
 {
   "$schema": "https://railway.app/railway.schema.json",
   "build": {
-    "builder": "NIXPACKS",
-    "buildCommand": "npm ci && npm run build",
-    "nixpacksConfigPath": "nixpacks.toml"
+    "builder": "DOCKERFILE",
+    "dockerfilePath": "Dockerfile"
   },
   "deploy": {
     "startCommand": "npm run start",