dockerfile: shaving off old bits; use rust stable now

Building multi-layered containers gave weird 500 errors. I think they
were permission based but don't have the time to look into it.

Signed-off-by: Gunwant Jain <mail@wantguns.dev>

Dockerfile

@@ -1,19 +1,16 @@
-FROM rustlang/rust:nightly-slim AS builder
-WORKDIR app
+FROM rust:1 as builder
+WORKDIR /app
 COPY . .
-RUN cargo build --release
 
-FROM debian:buster-slim AS runtime
-WORKDIR app
-RUN apt-get update -y \
-    && apt-get autoremove -y \
-    && apt-get clean -y \
-    && rm -rf /var/lib/apt/lists/*
+RUN cargo install --path .
+RUN cargo clean
 
-COPY --from=builder /app/target/release/bin bin
 RUN mkdir -p upload
 COPY ./templates templates
+COPY ./static static
+
 ENV ROCKET_ADDRESS=0.0.0.0
 ENV ROCKET_PORT=6162
 
-ENTRYPOINT ["./bin"]
+EXPOSE 6162
+CMD ["bin"]