Remove compose env interpolation and set fixed TZ defaults

Apps/_template/docker-compose.yaml

@@ -1,24 +1,20 @@
 name: sample-app
 
-x-image:
-  namespace: ${IMAGE_NAMESPACE:-joafri}
-  tag: ${IMAGE_TAG:-main}
-
 services:
   app:
-    image: ${IMAGE_NAMESPACE:-joafri}/sample-app-app:${IMAGE_TAG:-main}
+    image: joafri/sample-app-app:main
     container_name: sample-app
     restart: unless-stopped
 
     environment:
-      TZ: ${TZ}
-      PUID: ${PUID}
-      PGID: ${PGID}
-      WEBUI_PORT: ${WEBUI_PORT:-8080}
+      TZ: Europe/Stockholm
+      PUID: "1000"
+      PGID: "1000"
+      WEBUI_PORT: "8080"
 
     ports:
       - target: 8080
-        published: ${WEBUI_PORT:-8080}
+        published: "8080"
         protocol: tcp
 
     volumes:
@@ -57,10 +53,10 @@ x-casaos:
     - amd64
     - arm64
   main: app
-  category: Utilities
+  category: phirna
   author: Zima Apps Team
   developer: example
-  icon: https://example.invalid/icon.png
+  icon: https://cdn.simpleicons.org/docker
   tagline:
     en_US: Replace with a short one-line value proposition
   description:
@@ -68,4 +64,4 @@ x-casaos:
   title:
     en_US: Sample App
   index: /
-  port_map: ${WEBUI_PORT:-8080}
+  port_map: "8080"