use alpine docker builder

Signed-off-by: Suntharesan Mohan <[email protected]>

.dockerignore

@@ -3,9 +3,9 @@
 
 # But not these files
 !build_scripts
+!benches
 !humanize
 !merit-api
 !src
-!static
 !Cargo.toml
 !Cargo.lock

Dockerfile

@@ -2,41 +2,45 @@
 # Cargo Build Stage
 # ------------------------------------------------------------------------------
 
-FROM ekidd/rust-musl-builder:nightly-2020-07-12 as cargo-build
+FROM rustlang/rust:nightly-alpine as toolchain
 
-WORKDIR /usr/src/
+RUN adduser -D -h /merit -g "" merit
 
-# Fix permissions on source code.
-RUN sudo chown -R rust:rust /home/rust \
-    && sudo chown -R rust:rust /usr/src
+RUN apk add make zlib-dev openssl-dev musl-dev
 
-COPY . .
+USER merit
+
+ENV USER=merit
+ENV PATH=/merit/.cargo/bin:$PATH
 
-RUN mkdir .cargo \
-    && cargo vendor > .cargo/config
+WORKDIR /merit
 
-RUN rustup target add x86_64-unknown-linux-musl
+RUN cargo init --lib --vcs none
+RUN cargo new humanize --lib --vcs none
+RUN cargo new merit-api --lib --vcs none
+
+RUN mkdir .cargo
+RUN cargo vendor > .cargo/config
+
+COPY . .
 
 RUN OPENSSL_STATIC=true \
-    RUSTFLAGS=-Clinker=musl-gcc \
     cargo build --release --target=x86_64-unknown-linux-musl -p merit-api
 
 # ------------------------------------------------------------------------------
 # Final Stage
 # ------------------------------------------------------------------------------
 
-FROM alpine:latest
+FROM alpine:3.12
 
 ENV PORT=8080 \
     LOG_LEVEL="actix_web=info"
 
 WORKDIR /home/merit/bin/
 
-COPY --from=cargo-build /usr/src/target/x86_64-unknown-linux-musl/release/merit-api .
+COPY --from=toolchain /merit/target/x86_64-unknown-linux-musl/release/merit-api .
 
-RUN addgroup -g 1000 merit \
-    && adduser -D -s /bin/sh -u 1000 -G merit merit \
-    && chown merit:merit merit-api
+RUN adduser -D -H -g "" merit
 
 USER merit