Merge pull request fuergaosi233#2 from BoynChan/docker_cache_layer

🌈Add cache layer in docker building

Author: fuergaosi233

.dockerignore

@@ -19,5 +19,4 @@ Cargo.lock
 *.pdb
 
 # End of https://www.toptal.com/developers/gitignore/api/rust
-n
-.env
+n

Dockerfile

@@ -1,7 +1,18 @@
 FROM rust:1.65 as builder
+
+RUN cargo new --bin app
 WORKDIR /app
 COPY Cargo.toml Cargo.toml
+# Dry running build command to make Docker cache layer
+RUN cargo build --release
+RUN rm src/*.rs
+
 COPY src src
 RUN cargo build --release
+
+# Use slim image to place build result
+FROM debian:stable-slim
+COPY .env .env
+COPY --from=builder ./app/target/release/chatgpt-proxy-server .
 EXPOSE 3000
-CMD ["./target/release/chatgpt-proxy-server"]
+CMD ["./chatgpt-proxy-server"]