Fixed tiny docker issue

Dockerfile

@@ -14,7 +14,7 @@ RUN apk update && \
 # Build the dependencies
 # This is done separately to reduce average compile time
 # Afterwards, we remove the dummy src directory
-COPY Cargo.toml Cargo.lock .
+COPY Cargo.toml Cargo.lock ./
 RUN cargo build --release && \
     rm src/*.rs
 

Makefile

@@ -1,4 +1,4 @@
-IMAGE := rust_api:latest
+IMAGE := rust-api:latest
 shell := /bin/bash