🔧(frontend) add conditional sourcemap generation for error tracking

Enable sourcemaps via env variable to link Sentry/PostHog exceptions to
source code. Enable by default for DINUM frontend image to improve
debugging capabilities.

docker/dinum-frontend/Dockerfile

@@ -17,6 +17,7 @@ FROM frontend-deps AS meet-builder
 WORKDIR /home/frontend
 
 ENV VITE_APP_TITLE="Visio"
+ENV VITE_BUILD_SOURCEMAP="true"
 
 RUN npm run build
 

src/frontend/vite.config.ts

@@ -7,6 +7,9 @@ export default defineConfig(({ mode }) => {
   const env = loadEnv(mode, process.cwd())
   return {
     plugins: [react(), tsconfigPaths()],
+    build: {
+      sourcemap: env.VITE_BUILD_SOURCEMAP === 'true',
+    },
     server: {
       port: parseInt(env.VITE_PORT) || 3000,
       host: env.VITE_HOST ?? 'localhost',