Oops, add tini.

Dockerfile

@@ -141,6 +141,9 @@ FROM ${BASE_IMG} AS final
 # Copy binaries from the 'source' build stage into the image we are building
 COPY --from=source /tmp/out/bin/* /usr/local/bin/
 
+# Install required runtime dependencies
+RUN apk add --no-cache tini
+
 # Use Tini to ensure that our application responds to CTRL-C when run in the
 # foreground without the Docker argument "--init" (which is actually another
 # way of activating Tini, but cannot be enabled from inside the Docker image).