Update for dns changes

vigilcare-dashboard/Dockerfile

@@ -17,5 +17,5 @@ COPY --from=build /src/dist /usr/share/nginx/html
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 EXPOSE 80
 
-HEALTHCHECK --interval=30s --timeout=3s --retries=3 \
-  CMD wget -qO- http://localhost/ >/dev/null || exit 1
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -qO- http://127.0.0.1/ >/dev/null || exit 1

vigilcare-dashboard/nginx.conf

@@ -1,5 +1,10 @@
 server {
     listen 80;
+    # Required explicitly: the nginx image's 10-listen-on-ipv6-by-default.sh
+    # only patches the stock default.conf. We replace that file, so without
+    # this line the container listens on IPv4 only while HEALTHCHECK wget
+    # resolves localhost to ::1 and fails → Docker reports unhealthy.
+    listen [::]:80;
     server_name _;
     root /usr/share/nginx/html;
     index index.html;