feat: add custom Postgres port support for Dispatcharr upgrade (#13347)

Author: MickLesk

ct/dispatcharr.sh

@@ -70,7 +70,7 @@ function update_script() {
       source /opt/dispatcharr/.env
       set +o allexport
       if [[ -n "$POSTGRES_DB" ]] && [[ -n "$POSTGRES_USER" ]] && [[ -n "$POSTGRES_PASSWORD" ]]; then
-        PGPASSWORD=$POSTGRES_PASSWORD pg_dump -U $POSTGRES_USER -h ${POSTGRES_HOST:-localhost} $POSTGRES_DB >/tmp/dispatcharr_db_$(date +%F).sql
+        PGPASSWORD=$POSTGRES_PASSWORD pg_dump -U "$POSTGRES_USER" -h "${POSTGRES_HOST:-localhost}" -p "${POSTGRES_PORT:-5432}" "$POSTGRES_DB" >/tmp/dispatcharr_db_$(date +%F).sql
         msg_info "Database backup created"
       fi
     fi