fixed a bunch of variables and modified the Gitea compose a lot

Doku/.env.example

@@ -1,2 +1,5 @@
+# Docker image tag for amerkurev/doku (e.g. "1.2.3" or "latest"); defaults to latest if unset
+DOKU_VERSION="latest"
+
 # Main interface port for accessing the application
-DOKU_PORT="8000"
+DOKU_PORT="9090"

Doku/docker-compose.yaml

@@ -1,12 +1,12 @@
 services:
   app:
-    image: amerkurev/doku:latest
+    image: amerkurev/doku:${DOKU_VERSION:-latest}
     container_name: doku
     volumes:
       - /var/run/docker.sock:/var/run/docker.sock:ro
       - /:/hostroot:ro
     ports:
-      - ${DOKU_PORT}:9090
+      - ${DOKU_PORT:-9090}:9090
     deploy:
       resources:
         limits: