feat: readiness endpoint KEH-228

.prod/nginx.conf

@@ -23,7 +23,9 @@ http {
         }
 
         location /readiness {
-            return 200 'OK';
+            add_header Content-Type application/json;
+            add_header Cache-Control "no-cache, no-store, must-revalidate";
+            return 200 '{"status": "ok", "release": "${REACT_APP_RELEASE}", "packageVersion": "${APP_VERSION}"}';
         }
 
         location / {

Dockerfile

@@ -57,8 +57,17 @@ FROM appbase as staticbuilder
 
 WORKDIR /app
 
+ARG REACT_APP_SENTRY_RELEASE
+
+ENV REACT_APP_RELEASE=${REACT_APP_SENTRY_RELEASE:-""}
+
 RUN yarn build
 
+# Process nginx configuration with APP_VERSION substitution
+COPY .prod/nginx.conf /app/nginx.conf.template
+RUN export APP_VERSION=$(yarn --silent app:version | tr -d '\n') && \
+    envsubst '${APP_VERSION},${REACT_APP_RELEASE}' < /app/nginx.conf.template > /app/nginx.conf
+
 # =============================
 FROM registry.access.redhat.com/ubi9/nginx-122 as production
 # =============================
@@ -71,8 +80,8 @@ RUN chgrp -R 0 /usr/share/nginx/html && \
 # Copy static build
 COPY --from=staticbuilder /app/build /usr/share/nginx/html
 
-# Copy nginx config
-COPY .prod/nginx.conf  /etc/nginx/nginx.conf
+# Copy processed nginx config from build stage
+COPY --from=staticbuilder /app/nginx.conf /etc/nginx/nginx.conf
 RUN mkdir /etc/nginx/env
 COPY .prod/nginx_env.conf  /etc/nginx/env/
 

package.json

@@ -7,6 +7,7 @@
     "node": ">=22.13.1"
   },
   "scripts": {
+    "app:version": "echo \"$npm_package_version\"",
     "start": "if test $NODE_MAX_MEMORY_MIB ; then node --max-old-space-size=$NODE_MAX_MEMORY_MIB yarn clear-babel-cache && yarn update-runtime-env && vite ; else yarn clear-babel-cache && yarn update-runtime-env && vite ; fi",
     "build": "vite build",
     "serve": "vite preview",