chore(deps): update gcr.io/kaniko-project/executor docker tag to v1.21.1

Dockerfile

@@ -2,7 +2,7 @@ FROM alpine as certs
 
 RUN apk --update add ca-certificates
 
-FROM gcr.io/kaniko-project/executor:v1.20.0-debug
+FROM gcr.io/kaniko-project/executor:v1.21.1-debug
 
 SHELL ["/busybox/sh", "-c"]
 

entrypoint.sh

@@ -94,6 +94,8 @@ EOF
 # https://github.com/GoogleContainerTools/kaniko/issues/1803
 # https://github.com/GoogleContainerTools/kaniko/issues/1349
 export IFS=''
+# Removes a trailing new line
+ARGS=$(echo "${ARGS}" | sed 's/\n*$//')
 kaniko_cmd="/kaniko/executor ${ARGS} --reproducible --force"
 echo "Running kaniko command ${kaniko_cmd}"
 eval "${kaniko_cmd}"