Fix docker user

Dockerfile

@@ -31,9 +31,15 @@ RUN --mount=type=cache,target=/root/.cache/go-build \
 ENTRYPOINT [ "/start.sh", "/workspace/manager" ]
 
 # Copy the controller-manager into a thin image
-FROM golang:1.19.5
+FROM alpine:3.11
 WORKDIR /
 COPY --from=builder /workspace/manager .
-# Use uid of nonroot user (65532) because kubernetes expects numeric user when applying pod security policies
-USER 65532
+# add new user
+ARG USER=nonroot
+ENV HOME /home/$USER
+RUN adduser -D $USER \
+        && mkdir -p /etc/sudoers.d \
+        && echo "$USER ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/$USER \
+        && chmod 0440 /etc/sudoers.d/$USER
+USER 1000
 ENTRYPOINT ["/manager"]