fix docker build

Author: rink1969

.gitignore

@@ -59,3 +59,5 @@ logs/
 
 # db file
 *.db
+
+Cargo.lock

Dockerfile

@@ -1,8 +1,9 @@
 FROM rust:slim-buster AS buildstage
 WORKDIR /build
 RUN /bin/sh -c set -eux;\
+    rustup component add rustfmt;\
     apt-get update;\
-    apt-get install -y --no-install-recommends git;\
+    apt-get install -y --no-install-recommends git protobuf-compiler;\
     rm -rf /var/lib/apt/lists/*;
 COPY . /build/
 RUN cargo build --release