simplifying docker workflow

Dockerfile

@@ -17,12 +17,16 @@ RUN CGO_ENABLED=0 GOOS=linux GOARCH=${TARGETARCH} go build \
 
 FROM alpine:latest
 
-RUN adduser -D -u 1000 deployer && \
-    chown -R deployer:deployer /tmp
+ARG UID
+ARG GID
+
+RUN addgroup -g ${GID} -S tingz && \
+    adduser -u ${UID} -S -G tingz -s /sbin/nologin tingz && \
+    chown -R tingz:tingz /tmp
 
 COPY --from=builder /bin/deployer /deployer
 
-USER deployer
+USER tingz
 
 EXPOSE 8080