Update signup success message and clean up workspace

Dockerfile.dev

@@ -0,0 +1,16 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+# Install dependencies based on the preferred package manager
+COPY package.json package-lock.json ./
+RUN npm ci
+
+# Copy the rest of the application code
+COPY . .
+
+# Set memory limit to prevent Next.js dev server from eating RAM
+ENV NODE_OPTIONS="--max-old-space-size=512"
+
+# Start the Next.js development server
+CMD ["npm", "run", "dev"]