Slim final image

Using an intermediate image for building. Could possibly slim further by making the `RUN_TAG` a slim variant

Dockerfile

@@ -1,4 +1,7 @@
-FROM rust:1.46
+ARG BUILD_TAG=1.46
+ARG RUN_TAG=$BUILD_TAG
+
+FROM rust:$BUILD_TAG as builder
 
 WORKDIR /usr/src/
 RUN USER=root cargo new --bin vaultwarden_ldap
@@ -12,6 +15,10 @@ RUN cargo build --locked --release
 RUN rm ./target/release/deps/vaultwarden_ldap*
 # Copy source and install
 COPY src ./src
-RUN cargo install --path .
+RUN cargo build --release
 
-CMD ["vaultwarden_ldap"]
+FROM rust:$RUN_TAG
+WORKDIR /app
+COPY --from=builder /usr/src/vaultwarden_ldap/target/release/vaultwarden_ldap /usr/local/bin/
+
+CMD ["/usr/local/bin/vaultwarden_ldap"]

docker-compose.yml

@@ -4,7 +4,7 @@ services:
   ldap_sync:
     build:
       context: .
-      dockerfile: Dockerfile.alpine
+      dockerfile: Dockerfile
     volumes:
       - ./example.config.toml:/config.toml:ro
       # ./root.cert:/usr/src/vaultwarden_ldap/root.cert:ro