Fix launcher build-time configuration and static asset caching

Author: man4ish

Dockerfile

@@ -4,6 +4,21 @@ WORKDIR /app
 COPY package*.json ./
 RUN npm ci
 COPY . .
+# CRA inlines REACT_APP_* vars at build time (`npm run build`), not at container
+# runtime -- setting them in docker-compose.yml's `environment:` only affects the
+# already-built static bundle's process, which never reads them. They have to
+# come in as build args here, or the src/*.jsx fallbacks (127.0.0.1:8000 etc.)
+# are silently the only value that's ever actually compiled in.
+ARG REACT_APP_OMNIBIOAI_BASE_URL
+ARG REACT_APP_OMNIBIOAI_TOKEN
+ARG REACT_APP_JUPYTER_BASE
+ARG REACT_APP_JUPYTER_TOKEN
+ARG REACT_APP_USE_MOCK
+ENV REACT_APP_OMNIBIOAI_BASE_URL=$REACT_APP_OMNIBIOAI_BASE_URL \
+    REACT_APP_OMNIBIOAI_TOKEN=$REACT_APP_OMNIBIOAI_TOKEN \
+    REACT_APP_JUPYTER_BASE=$REACT_APP_JUPYTER_BASE \
+    REACT_APP_JUPYTER_TOKEN=$REACT_APP_JUPYTER_TOKEN \
+    REACT_APP_USE_MOCK=$REACT_APP_USE_MOCK
 RUN npm run build
 
 # ── Stage 2: nginx + node API server ──────────────────────────────────────────

nginx.conf

@@ -15,4 +15,17 @@ server {
     location / {
         try_files $uri $uri/ /index.html;
     }
+
+    # Long-cache hashed build assets; index.html itself falls through to the
+    # default (uncached) location above so deploys are picked up immediately.
+    # Mirrors omnibioai-studio's docker/nginx-web.conf split -- without this,
+    # neither index.html nor the hashed static/js|css/*.js|css files carried
+    # any explicit Cache-Control at all, leaving browsers to fall back on
+    # heuristic caching for both, including the ones that should be
+    # immutable forever and the one that must never look stale.
+    location ~* \.(?:js|css|woff2?|ttf|svg|png|jpg|jpeg|gif|ico)$ {
+        try_files $uri =404;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
 }