Dockerfile.fdb buster to trixie (#2275)

resources/docker/Dockerfile.fdb

@@ -1,12 +1,13 @@
-FROM debian:buster-slim AS chef 
+FROM debian:trixie-slim AS chef
 RUN apt-get update && \
     export DEBIAN_FRONTEND=noninteractive && \
     apt-get install -yq \
     build-essential \
     cmake \
-    clang \ 
+    clang \
     curl \
-    protobuf-compiler
+    protobuf-compiler \
+    adduser
 ENV RUSTUP_HOME=/opt/rust/rustup \
     PATH=/home/root/.cargo/bin:/opt/rust/cargo/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 RUN curl https://sh.rustup.rs -sSf | \
@@ -28,7 +29,7 @@ COPY resources/ resources/
 COPY tests/ tests/
 RUN cargo chef prepare --recipe-path recipe.json
 
-FROM chef AS builder 
+FROM chef AS builder
 COPY --from=planner /app/recipe.json recipe.json
 RUN cargo chef cook --release --recipe-path recipe.json
 COPY Cargo.toml .
@@ -38,7 +39,7 @@ COPY resources/ resources/
 COPY tests/ tests/
 RUN cargo build --manifest-path=crates/main/Cargo.toml --no-default-features --features foundationdb --release
 
-FROM debian:buster-slim AS runtime
+FROM debian:trixie-slim AS runtime
 
 COPY --from=builder /app/target/release/stalwart /usr/local/bin/stalwart
 RUN apt-get update -y && apt-get install -yq ca-certificates