chore: run the program in the same image/stage as the builder (eliminating the runner) until I fix static linking

Dockerfile

@@ -1,5 +1,5 @@
 ARG ALPINE_TAG=3.23.4
-FROM alpine:${ALPINE_TAG} AS builder
+FROM alpine:${ALPINE_TAG}
 
 ARG BUILD_BASE_VERSION=0.5-r3
 RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
@@ -50,11 +50,6 @@ RUN \
     --mount=type=cache,target=/usr/local/cargo/registry/ \
     cd /root/app && \
     cargo build --release && \
-    cp target/release/fomo-reducer /root/program
-
-ARG ALPINE_TAG=3.23.4
-FROM alpine:${ALPINE_TAG} AS runner
-
-COPY --from=builder /root/program /program
+    cp target/release/fomo-reducer /program
 
 ENTRYPOINT ["/program"]