Fix Dockerfile as described in CSPF-Founder#16

MyristicaFragrans · web-flow · commit 16bfcd1a187b · 2022-10-05T10:22:29.000-06:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,4 +1,4 @@
-FROM tomcat
+FROM tomcat:8.5.55-jdk8-openjdk
 
 COPY . .
 
