Use alpine base image and a builder stage

.dockerignore

@@ -0,0 +1,7 @@
+.git/
+target/
+Dockerfile
+docker-compose.yml
+shell.nix
+nix/
+openapi/

Dockerfile

@@ -1,12 +1,23 @@
-FROM rustlang/rust:nightly-buster
+FROM rustlang/rust:nightly-alpine AS builder
 
 WORKDIR /usr/src/zauth
 
-RUN apt-get update && apt-get install -y netcat
+RUN apk add --no-cache musl-dev mariadb-connector-c-dev postgresql-dev sqlite-dev
 
 RUN cargo install diesel_cli
 COPY . .
 RUN cargo install --path .
 
+FROM alpine
+
+WORKDIR /usr/src/zauth
+
+RUN apk add --no-cache netcat-openbsd libpq
+COPY --from=builder /usr/local/cargo/bin/diesel /usr/local/cargo/bin/zauth /usr/local/bin/
+COPY Rocket.toml diesel.toml /usr/src/zauth/
+COPY migrations/ migrations/
+COPY docker_misc/ docker_misc/
+COPY static/ static/
+
 ENV ROCKET_ENV production
-CMD ["zauth"]
+CMD ["zauth"]