Define explicit source image version

nicekiwi · nicekiwi · commit 54ebc5d334ee · 2021-01-13T13:04:12.000+13:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM php:8.0-fpm-alpine
+FROM php:8.0.1-fpm-alpine3.12
 
 # Setup ENV defaults
 ENV ENVIROMENT=production
