Adding some helpful documentation

docker/Dockerfile.prisma

@@ -1,3 +1,6 @@
+# This docker file will update the web database with schema changes.  Later it
+# will be updated to do prisma migrations.
+
 FROM --platform=linux/amd64 node:16.18.0 AS runner
 
 WORKDIR /app

docker/Dockerfile.website

@@ -1,3 +1,6 @@
+# Note: node:16.18.0 works most reliably when using different platforms (namely
+# Mac M1) and avoids recent Prisma docker bugs that lead to segfaults.
+
 # Install dependencies only when needed
 FROM node:16.18.0 AS deps
 WORKDIR /app