changed docker base image to ubuntu:latest

Dockerfile

@@ -1,13 +1,12 @@
-FROM alpine
+FROM ubuntu:latest
 
-RUN apk update
-RUN apk add --no-cache \
-	socat 
+RUN apt update && \
+    apt install socat -y
 
 WORKDIR /app
 
 COPY ./flag.txt .
-COPY ./spell-warz .
+COPY ./spell-warz-again .
 
 CMD socat tcp-listen:12345,reuseaddr,fork EXEC:\"./spell-warz\"