diff --git a/.dockerignore b/.dockerignore
index 257acde2..176d1d4a 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -5,3 +5,7 @@
 **/coverage
 **/.env*
 screenshots
+frontend/public/maps_optimized
+api
+database
+docs
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 76580fd5..422325e7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -202,6 +202,12 @@ jobs:
         working-directory: frontend
         run: pnpm exec tsc --noEmit
 
+      - name: Export optimized maps
+        working-directory: server
+        run: |
+          pnpm install --frozen-lockfile
+          pnpm export-frontend-maps
+
       - name: Build
         working-directory: frontend
         env:
diff --git a/README.md b/README.md
index 7e8739ae..c3226d5c 100644
--- a/README.md
+++ b/README.md
@@ -165,6 +165,14 @@ pnpm dev
 
 Abrir `http://localhost:3000`.
 
+Los mapas optimizados (`frontend/public/maps_optimized`) no están en git. Docker los genera al construir la imagen. Para un build de producción en local:
+
+```bash
+cd server
+pnpm install
+pnpm export-frontend-maps
+```
+
 ## Arquitectura
 
 | Componente | Carpeta | Puerto |
diff --git a/frontend/Dockerfile b/frontend/Dockerfile
index 07e38025..2510963a 100644
--- a/frontend/Dockerfile
+++ b/frontend/Dockerfile
@@ -5,6 +5,20 @@ ENV PATH="$PNPM_HOME:$PATH"
 
 RUN corepack enable
 
+FROM base AS maps
+WORKDIR /work/server
+
+COPY server/src/mapNpcStorage.ts src/mapNpcStorage.ts
+COPY server/src/scripts/exportFrontendOptimizedMaps.ts src/scripts/exportFrontendOptimizedMaps.ts
+COPY server/mapas_source/ mapas_source/
+
+RUN pnpm dlx tsx@4.22.1 src/scripts/exportFrontendOptimizedMaps.ts --output-dir=/maps_optimized \
+    && test -f /maps_optimized/mapa_1.json \
+    && SOURCE_COUNT="$(find mapas_source -mindepth 1 -maxdepth 1 -type d -name 'mapa_*' | wc -l)" \
+    && OUTPUT_COUNT="$(find /maps_optimized -maxdepth 1 -type f -name 'mapa_*.json' | wc -l)" \
+    && echo "Export check: ${SOURCE_COUNT} dirs en mapas_source, ${OUTPUT_COUNT} mapa_*.json" \
+    && test "${SOURCE_COUNT}" -eq "${OUTPUT_COUNT}"
+
 FROM base AS deps
 WORKDIR /app/frontend
 
@@ -44,6 +58,9 @@ ENV GAME_DATA_ADMIN_PROXY_TOKEN=$GAME_DATA_ADMIN_PROXY_TOKEN
 
 COPY packages/protocol /app/packages/protocol
 COPY frontend .
+RUN rm -rf ./public/maps_optimized
+COPY --from=maps /maps_optimized ./public/maps_optimized
+RUN node ./scripts/require-optimized-maps.mjs
 RUN pnpm build
 
 FROM base AS runtime
diff --git a/frontend/package.json b/frontend/package.json
index 5d08000d..bc890883 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -6,7 +6,8 @@
         "protocol:build": "pnpm exec tsc -p ../packages/protocol/tsconfig.json",
         "predev": "pnpm run protocol:build",
         "dev": "next dev --turbopack --hostname 0.0.0.0",
-        "prebuild": "pnpm run protocol:build",
+        "prebuild": "pnpm run protocol:build && node ./scripts/require-optimized-maps.mjs",
+        "check:maps": "node ./scripts/require-optimized-maps.mjs",
         "build": "next build",
         "start": "next start",
         "lint": "eslint",
diff --git a/frontend/scripts/require-optimized-maps.mjs b/frontend/scripts/require-optimized-maps.mjs
new file mode 100644
index 00000000..b7b1b8d0
--- /dev/null
+++ b/frontend/scripts/require-optimized-maps.mjs
@@ -0,0 +1,62 @@
+import fs from "node:fs";
+import path from "node:path";
+
+const MAPS_DIR = path.resolve(process.cwd(), "public/maps_optimized");
+const SAMPLE_NAME = "mapa_1.json";
+const MAP_JSON_PATTERN = /^mapa_\d+\.json$/i;
+
+function fail(message) {
+    console.error(message);
+    process.exit(1);
+}
+
+function isOptimizedMapShape(value) {
+    return (
+        Boolean(value) &&
+        typeof value === "object" &&
+        typeof value.id === "number" &&
+        typeof value.w === "number" &&
+        typeof value.h === "number" &&
+        Array.isArray(value.d)
+    );
+}
+
+if (!fs.existsSync(MAPS_DIR) || !fs.statSync(MAPS_DIR).isDirectory()) {
+    fail(
+        `No está ${MAPS_DIR}. Los mapas optimizados no van en git: generálos con \`cd server && pnpm export-frontend-maps\`. Docker los arma solo al construir la imagen.`,
+    );
+}
+
+const mapFiles = fs.readdirSync(MAPS_DIR).filter((name) => MAP_JSON_PATTERN.test(name));
+
+if (mapFiles.length === 0) {
+    fail(
+        `La carpeta ${MAPS_DIR} no tiene ningún mapa_*.json. Corré \`cd server && pnpm export-frontend-maps\` antes del build de producción.`,
+    );
+}
+
+const samplePath = path.join(MAPS_DIR, SAMPLE_NAME);
+
+if (!fs.existsSync(samplePath)) {
+    fail(
+        `Falta ${samplePath}. El export quedó incompleto: volvé a correr \`pnpm export-frontend-maps\` desde server/.`,
+    );
+}
+
+let sample;
+
+try {
+    sample = JSON.parse(fs.readFileSync(samplePath, "utf8"));
+} catch {
+    fail(
+        `${SAMPLE_NAME} no es JSON válido. El export salió mal; borralo y volvé a generar los mapas.`,
+    );
+}
+
+if (!isOptimizedMapShape(sample)) {
+    fail(
+        `${SAMPLE_NAME} no tiene la forma esperada ({ id: number, w: number, h: number, d: array }). El archivo no es un mapa optimizado válido.`,
+    );
+}
+
+console.log(`Mapas optimizados OK: ${mapFiles.length} archivos en ${MAPS_DIR}`);