ci(workflows): add github action for deleting data from remote database

  ## what
  - add github action for deleting data from remote database
    - install `psql` client
    - delete the data on table `activities`
    - reset auto increment for `activities.id` to 1

  ## how

  ## why
  - the database is being used by public with limited space
    - don't want to go overboard in using the database

  ## where
  - ./.github/workflows/remoteDatabaseReset.yaml

  ## usage

  ## commit id, issue or pull request

  ## notes

.github/workflows/remoteDatabaseReset.yaml

@@ -0,0 +1,28 @@
+---
+name: Delete data from remote database
+on: push
+
+# - https://stackoverflow.com/a/64697047/3053548
+
+jobs:
+  psql:
+    runs-on: ubuntu-latest
+    container: ubuntu
+    steps:
+      - name: install psql client
+        run: |
+          apt-get update
+          apt-get install --yes --no-install-recommends postgresql-client
+
+      - name: delete data from remote database and reset auto increment
+        run: |
+          psql "$CONNECTION_STRING" -c "DELETE FROM activities;"
+        env:
+          CONNECTION_STRING: ${{secrets.REMOTE_POSTGRES_CONNECTION_STRING }}
+
+      - name: reset auto increment
+        run: |
+          psql "$CONNECTION_STRING" -c "ALTER SEQUENCE public.activities_id_seq RESTART 1;"
+        env:
+          CONNECTION_STRING: ${{secrets.REMOTE_POSTGRES_CONNECTION_STRING }}
+