use fresh V in Dockerfile, upd build vflags, del unused dependency

Dockerfile

@@ -1,6 +1,17 @@
-FROM thevlang/vlang:latest AS builder
+FROM debian:bookworm AS vlang
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends ca-certificates gcc clang make git binutils libssl-dev libatomic1 && \
+    apt clean && rm -rf /var/cache/apt/archives/* && \
+    rm -rf /var/lib/apt/lists/*
+RUN git clone --depth=1 https://github.com/vlang/v /opt/v && \
+    cd /opt/v && \
+    make && \
+    /opt/v/v symlink && \
+    v version
+
+FROM vlang AS builder
 COPY . .
-RUN v -prod -skip-unused -cc gcc -cflags -static -cflags -s -d hv_version=$(git describe --tags) . -o /habraview
+RUN v -prod -cflags -static -cflags -s -d hv_version=$(git describe --tags) . -o /habraview
 
 FROM scratch AS prod
 COPY --from=builder /habraview .