Merge pull request #60 from XComp/use-hash-instead-of-version-tag

Use SHA instead of Docker version tag for base image to allow for consistent code execution.

Author: Burnett01

Dockerfile

@@ -1,4 +1,5 @@
-FROM drinternet/rsync:v1.4.4
+# drinternet/rsync@v1.4.4
+FROM drinternet/rsync@sha256:15b2949838074bd93c49421c22380396a0cd53a322439e799ac87afcadcfe234
 
 # Copy entrypoint
 COPY entrypoint.sh /entrypoint.sh