Propagate Modern.js publicDir assets through sync + Docker build

The config/public/ directory (fonts, images, leaflet icons, favicons) is
Modern.js's publicDir convention — copied into dist/standalone/public/ at
build time. Two pre-existing gaps caused this to break on the deployed
SSR image and any fresh sync:

- scripts/sync-to-flights-front.sh did not copy config/ to the target
  repo, so the flights-front tree was missing /assets/** entirely.
- Dockerfile.react only copied src/, skipping config/; pnpm
  build:standalone ran without a publicDir source.

Result was that every /assets/** URL served the SSR HTML index with
Content-Type: text/html, producing OTS font-parse errors
(sfntVersion 1008821359 == '<!DT') and silently broken images.

Fix mirrors what was applied ad-hoc in Aeroflot.Flights.Front; this makes
future syncs and Docker builds carry the assets automatically.

Dockerfile.react

@@ -1,7 +1,6 @@
-# Dockerfile.react — Multi-stage build for standalone SSR server
-# Coexists with the legacy ASP.NET Dockerfile
+# Dockerfile.react — Multi-stage build for Modern.js SSR standalone app.
+# Coexists with the legacy ASP.NET Dockerfile.
 
-# Stage 1: Install dependencies
 FROM node:24-slim AS deps
 WORKDIR /app
 
@@ -10,23 +9,33 @@ RUN corepack enable pnpm
 COPY package.json pnpm-lock.yaml ./
 RUN pnpm install --frozen-lockfile
 
-# Stage 2: Build standalone target
 FROM deps AS build
 WORKDIR /app
 
 COPY modern.config.ts module-federation.config.ts tsconfig.json ./
 COPY src/ src/
+# Modern.js publicDir: fonts, images, leaflet marker icons, favicons.
+# Copied into dist/standalone/public/ at build time. Without this the
+# /assets/** URLs resolve to the SPA index HTML (OTS font-parse failures,
+# broken backgrounds, missing tile icons).
+COPY config/ config/
 
 RUN pnpm build:standalone
 
-# Stage 3: Minimal production image
 FROM node:24-slim AS runtime
 WORKDIR /app
 
 ENV NODE_ENV=production
+ENV HOST=0.0.0.0
+ENV PORT=8080
 
+RUN corepack enable pnpm
+
+COPY --from=build /app/node_modules ./node_modules
 COPY --from=build /app/dist/standalone/ ./dist/standalone/
+COPY --from=build /app/src/ ./src/
+COPY package.json modern.config.ts module-federation.config.ts ./
 
 EXPOSE 8080
 
-ENTRYPOINT ["node", "dist/standalone/index.js"]
+CMD ["pnpm", "exec", "modern", "serve"]

scripts/sync-to-flights-front.sh

@@ -35,6 +35,10 @@ echo "2/5  Copying source files..."
 cp -r "$SRC_DIR/src"                    "$TARGET_DIR/src"
 cp -r "$SRC_DIR/tests"                  "$TARGET_DIR/tests"
 cp -r "$SRC_DIR/scripts"                "$TARGET_DIR/scripts"
+# Modern.js publicDir — fonts, images, leaflet icons, favicons. Copied to
+# dist/standalone/public/ at build time. Without these the app serves the
+# SPA index for /assets/** and breaks @font-face, img references, tile icons.
+cp -r "$SRC_DIR/config"                 "$TARGET_DIR/config"
 cp    "$SRC_DIR/package.json"           "$TARGET_DIR/package.json"
 cp    "$SRC_DIR/pnpm-lock.yaml"         "$TARGET_DIR/pnpm-lock.yaml"
 cp    "$SRC_DIR/tsconfig.json"          "$TARGET_DIR/tsconfig.json"
@@ -45,6 +49,7 @@ cp    "$SRC_DIR/playwright.config.ts"   "$TARGET_DIR/playwright.config.ts"
 cp    "$SRC_DIR/eslint.config.js"       "$TARGET_DIR/eslint.config.js"
 cp    "$SRC_DIR/Makefile"               "$TARGET_DIR/Makefile"
 cp    "$SRC_DIR/CLAUDE.md"              "$TARGET_DIR/CLAUDE.md"
+cp    "$SRC_DIR/AGENTS.md"              "$TARGET_DIR/AGENTS.md"
 
 # Dockerfile — use the SSR-specific one
 cp    "$SRC_DIR/Dockerfile.react"       "$TARGET_DIR/Dockerfile"