[Docker] Clear caches on migrate

CHANGELOG.rst

@@ -13,6 +13,7 @@ Changed
 ~~~~~~~
 
 * [Dev] The (undocumented) setting PDF_CONTEXT_PROCESSORS is now named NON_REQUEST_CONTEXT_PROCESSORS
+* [Docker] Cache is now cleared if migrations are applied
 
 `2.7.1`_ - 2022-01-28
 ---------------------

docker-startup.sh

@@ -48,7 +48,11 @@ wait_database() {
 
 prepare_database() {
 	# Migrate database; should only be run in app container or job
-	aleksis-admin migrate && aleksis-admin createinitialrevisions
+	if aleksis-admin migrate --check >/dev/null 2>&1; then
+		aleksis-admin migrate && \
+		aleksis-admin clear_cache && \
+		aleksis-admin createinitialrevisions
+	fi
 }
 
 # Wait for database to be reachable under all conditions