chore: eliminate rocksdb which makes everything better

Dockerfile

@@ -1,5 +1,5 @@
-ARG ALPINE_TAG=3.23.4
-FROM alpine:${ALPINE_TAG}
+ARG RUST_TAG=1.94.1-alpine3.23
+FROM rust:${RUST_TAG} AS builder
 
 ARG BUILD_BASE_VERSION=0.5-r3
 RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
@@ -9,30 +9,10 @@ ARG CAPNPROTO_DEV_VERSION=1.2.0-r0
 RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
     apk add --update capnproto-dev=${CAPNPROTO_DEV_VERSION}
 
-ARG CARGO_VERSION=1.91.1-r1
-RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
-    apk add --update cargo=${CARGO_VERSION}
-
-ARG CLANG21_DEV_VERSION=21.1.2-r2
-RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
-    apk add --update clang21-dev=${CLANG21_DEV_VERSION}
-
-ARG CLANG21_STATIC_VERSION=21.1.2-r2
-RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
-    apk add --update clang21-static=${CLANG21_STATIC_VERSION}
-
 ARG CMAKE_VERSION=4.1.3-r0
 RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
     apk add --update cmake=${CMAKE_VERSION}
 
-ARG LLVM21_DEV_VERSION=21.1.2-r1
-RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
-    apk add --update llvm21-dev=${LLVM21_DEV_VERSION}
-
-ARG LLVM21_STATIC_VERSION=21.1.2-r1
-RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
-    apk add --update llvm21-static=${LLVM21_STATIC_VERSION}
-
 ARG PROTOC_VERSION=31.1-r1
 RUN --mount=type=cache,sharing=locked,target=/var/cache/apk \
     apk add --update protoc=${PROTOC_VERSION}
@@ -50,6 +30,10 @@ RUN \
     --mount=type=cache,target=/usr/local/cargo/registry/ \
     cd /root/app && \
     cargo build --release && \
-    cp target/release/fomo-reducer /program
+    cp target/release/fomo-reducer /root/program
+
+FROM scratch AS runner
+
+COPY --from=builder /root/program /program
 
 ENTRYPOINT ["/program"]