Fix Dockerfile build dependencies

- Install all dependencies (including dev dependencies) in builder stage
- Ensure TypeScript, Tailwind, and other build tools are available during build

Dockerfile

@@ -20,6 +20,9 @@ WORKDIR /app
 COPY --from=deps /app/node_modules ./node_modules
 COPY . .
 
+# Install all dependencies (including dev dependencies) for building
+RUN npm ci
+
 # Next.js collects completely anonymous telemetry data about general usage.
 # Learn more here: https://nextjs.org/telemetry
 # Uncomment the following line in case you want to disable telemetry during the build.