Updates charm to a modern version

charmcraft.yaml

@@ -1,10 +1,34 @@
 # Learn more about charmcraft.yaml configuration at:
 # https://juju.is/docs/sdk/charmcraft-config
-type: "charm"
-bases:
-  - build-on:
-    - name: "ubuntu"
-      channel: "20.04"
-    run-on:
-    - name: "ubuntu"
-      channel: "20.04"
+type: charm
+name: postgresql-data-k8s
+title: PostgreSQL Data Injector Charm
+
+summary: |
+  PostgreSQL Database Injector Charm
+
+description: |
+  This charm can be related to a postgresql-k8s charm (using the db-admin relation), and
+  this charm will execute the SQL tar dump given as a resource.
+
+  If the refresh-period (minutes) is non-zero, this charm will reexecute the SQL tar dump
+  after that number of minutes have passed since the last update.
+
+  This charm can be configured with the db-user config option, which will be the new
+  owner of the newly created data (otherwise, consumers of that database will encounter
+  Permission Denied errors).
+
+base: ubuntu@24.04
+platforms:
+  amd64:
+
+requires:
+  db-admin:
+    interface: pgsql
+    limit: 1
+    scope: global
+
+parts:
+  charm:
+    plugin: charm
+    source: .

requirements.txt

@@ -1,3 +1,4 @@
 ops >= 1.2.0
 ops-lib-pgsql
 pgconnstr
+requests