apply minor nginx patches (#384)

patching, I did not upgrade to next major version simply out of precaution

Author: jdries

Dockerfile

@@ -9,5 +9,5 @@ RUN npm install
 RUN npm run build
 
 # Copy build folder and run with nginx
-FROM nginx:1.28.0-alpine
+FROM nginx:1.28.3-alpine
 COPY --from=build /src/openeo-web-editor/dist /usr/share/nginx/html