app-httpd.conf

<VirtualHost *:8080>
    AllowEncodedSlashes NoDecode

    LoadModule proxy_module modules/mod_proxy.so
    LoadModule proxy_http_module modules/mod_proxy_http.so
    LoadModule proxy_wstunnel_module modules/mod_proxy_wstunnel.so
    LoadModule rewrite_module modules/mod_rewrite.so
    LoadModule include_module modules/mod_include.so
    LoadModule info_module modules/mod_info.so

    DocumentRoot /opt/bitnami/apache/htdocs/gridadmin/

    <Directory /opt/bitnami/apache/htdocs/gridadmin/>
        <Files "index.html">
          SetOutputFilter INCLUDES
        </Files>
        <FilesMatch "^(env\.json|idpSettings\.json)$">
          # FileETag Digest for stable Etags accross loadbalanced servers for mounted files.
          #   "FileETag Digest" is acceptable here because these are only small files so
          #   having to read the full content of the file instead of just the filesystem
          #   metadata is not prohibitedly expensive. A better alternative would be to find
          #   a way to have stable filesystem metadata on all servers because:
          #   - accessing file system metadata is a lot less expensive.
          #   - contrary to apache httpd, nginx doesn't have an option to change the ETag
          #     generation method and always uses the filesystem metadata (size, mtime),
          #     so using "FileEtag Digest" locks us in with apache httpd.
          #   NOTE: this doesn't apply to files in the image (their filesystem metadata
          #   is the same because it's from the image), only to mounted files (bind mount
          #   or volume mount in docker compose, configmap in kubernetes)
          #   NOTE2: Because we use single file bind mounts for our files, the contents
          #   and filesystem metadata of our files fall out of sync between the host and
          #   the containers when the file is deleted or replaced (more precisely, as
          #   soon as the inode number of the file changes) (this can happen quite silently
          #   if your editor replaces the file when saving), but this means using Digest doesn't
          #   solve this issue. This is a known docker limitation: https://github.com/moby/moby/issues/6011
          FileETag Digest
        </FilesMatch>
        Options +Includes
        Header set Cache-Control "no-cache"
    </Directory>

    <Directory /opt/bitnami/apache/htdocs/gridadmin/static/>
        # All files in this folder are public and have in their name
        # the hash of their content, so cache them very aggressively
        # as per recommended best practices
        Header set Cache-Control "public, max-age=31536000, immutable"
    </Directory>

    <Location "/actuator/info">
        SetHandler server-info
    </Location>
    AddModuleInfo mod_info.c 'Hostname: ${HOSTNAME}'

    RewriteEngine On
    RewriteMap remapbase "prg:/bin/sed -u -e 's;[^ ]* ;;' -e 's;[ ?].*;;' -e 's;[^/]*;..;g' -e 's;../..;;' -e 's/.//' -e 's;^$;.;'"

    RewriteCond /opt/bitnami/apache/htdocs/gridadmin%{REQUEST_URI} -f [OR]
    RewriteCond %{REQUEST_URI} ^/api/.* [OR]
    RewriteCond %{REQUEST_URI} ^/ws/.*
    RewriteRule ^ - [S=2]
    RewriteRule ^ "${remapbase:%{THE_REQUEST}}" [DPI]
    RewriteRule "^(.*)$" /index.html [E=BASE:$1,L]
    SetEnvIf BASE ^$ BASE=.

    ProxyRequests off
    ProxyPassMatch "^/api/gateway/(.*)$" http://gateway/$1 nocanon
    ProxyPassMatch "^/ws/gateway/(.*)$" ws://gateway/$1 nocanon
</VirtualHost>