Add PlantUML server

docker/web/Caddyfile

@@ -24,3 +24,7 @@ jupyter.pbrinkmeier.de {
         wug JDJhJDE0JEJrQXUzVWxFZ2JGVmx6YlZWTkpYdy5IMjRXdnZZdGw5SjZDcUg2ZWMxOEVjcEV6dWhIRmhD
     }
 }
+
+plantuml.pbrinkmeier.de {
+    reverse_proxy codi_plantuml:8080
+}

docker/web/docker-compose.yaml

@@ -25,8 +25,10 @@ services:
       - CMD_EMAIL=true
       - CMD_ALLOW_EMAIL_REGISTER=false
       - CMD_ALLOW_ANONYMOUS_EDITS=true
+      - CMD_PLANTUML_SERVER=https://plantuml.pbrinkmeier.de
     depends_on:
       - codi_db
+      - codi_plantuml
     volumes:
       - codi_uploads:/home/hackmd/app/public/uploads
     restart: always
@@ -39,6 +41,10 @@ services:
     volumes:
       - codi_database:/var/lib/postgresql/data
     restart: always
+  
+  codi_plantuml:
+    image: plantuml/plantuml-server:jetty-v1.2022.7
+    restart: always
 
   gitlab:
     image: gitlab/gitlab-ce:15.3.2-ce.0