dependency xclip added

Dockerfile

@@ -1,8 +1,9 @@
-FROM alpine
+FROM alpine:3.15.3
 
 RUN apk -U upgrade
 
 RUN apk --no-cache add curl jq w3m \
+    xclip # doesnot work because it requires X server \
     util-linux # for "columns" binary
 
 RUN curl -L "https://git.io/tmpmail" > tmpmail && chmod +x tmpmail