build: run container securely as a non-root user

- Add a non-root user for running the container
- Set the container to run as the new user instead of root

Signed-off-by: appleboy <appleboy.tw@gmail.com>

Author: appleboy

docker/Dockerfile

@@ -13,8 +13,11 @@ LABEL org.opencontainers.image.description="A CLI written in Go language that wr
 LABEL org.opencontainers.image.licenses=MIT
 
 RUN apk add --no-cache ca-certificates git && \
-  rm -rf /var/cache/apk/*
+  rm -rf /var/cache/apk/* && \
+  adduser -D -H -u 1000 codegpt
 
 COPY release/${TARGETOS}/${TARGETARCH}/codegpt /bin/
 
+USER codegpt
+
 CMD ["/bin/codegpt"]