Improve deploy script for externalresources

Change-Id: I6da45429ea1b82d73f0845e5925eeb37539dccf6
diff --git a/deploy-kalamar-plugin-externalresources.yml b/deploy-kalamar-plugin-externalresources.yml
index 549607e..d77ef5d 100644
--- a/deploy-kalamar-plugin-externalresources.yml
+++ b/deploy-kalamar-plugin-externalresources.yml
@@ -1,45 +1,61 @@
-- name: Deploy Kalamar-Plugin-ExternalResources to Test instance
+- name: Deploy Kalamar-Plugin-ExternalResources
   hosts:
     test-instance
   user: korap
   serial: 1
   tasks:
+    - name: Set instance
+      set_fact:
+        instance_path: "/opt/korap/instance-test/Kalamar-External"
+        instance_name: "kalamar-plugin-externalresources-test"
+
     - name: Save docker image
       local_action: ansible.builtin.command docker save korap/kalamar-plugin-externalresources:latest -o ./kalamar-plugin-externalresources-latest.tar
+
     - name: Copy docker image to hosts
       ansible.builtin.copy:
         src: ./kalamar-plugin-externalresources-latest.tar
-        dest: /opt/korap/instance-test/Kalamar-External/kalamar-plugin-externalresources-latest.tar
+        dest: "{{ instance_path}}/kalamar-plugin-externalresources-latest.tar"
         mode: '0644'
+
+    - name: Delete docker image tar
+      local_action:
+          module: ansible.builtin.file
+          path: ./kalamar-plugin-externalresources-latest.tar
+          state: absent
+        
     - name: Load docker image on host
-      ansible.builtin.command: docker load -i /opt/korap/instance-test/Kalamar-External/kalamar-plugin-externalresources-latest.tar
+      ansible.builtin.command: "docker load -i {{ instance_path}}/kalamar-plugin-externalresources-latest.tar"
+
     - name: Get UID for KorAP user
       getent:
         database: passwd
         key: korap
+
     - name: Gracefully stop and remove old docker container, if existing
       community.docker.docker_container:
         state: "absent"
-        name: kalamar-plugin-externalresources-test
+        name: "{{ instance_name }}"
         recreate: true
         keep_volumes: true
         comparisons:
           image: ignore   # do not restart containers with older versions of the image
+
     - name: Restart docker container
       community.docker.docker_container:
         image: korap/kalamar-plugin-externalresources:latest
         restart_policy: "unless-stopped"
         pull: false
-        name: kalamar-plugin-externalresources-test
+        name: "{{ instance_name }}"
         user: "{{ ansible_facts.getent_passwd[\"korap\"].1 }}"
         init: true
         detach: true
         mounts:
           - type: bind
-            source: "/opt/korap/instance-test/Kalamar-External/db"
+            source: "{{ instance_path }}/db"
             target: "/db"
           - type: bind
-            source: "/opt/korap/instance-test/Kalamar-External/.env"
+            source: "{{ instance_path }}/.env"
             target: "/.env"
         ports:
           - "5722:5722"