Optimize workflows (#25)

feat: optimize workflows

---------

Co-authored-by: Stavros <steveiliop56@gmail.com>

Dockerfile

@@ -1,20 +1,42 @@
-FROM rust:alpine AS build
-WORKDIR /
+### Build UI ###
+FROM node:20 AS web
 
+# Install bun
+RUN curl -fsSL https://bun.sh/install | bash
+
+# Copy web folder
+COPY ./web /web
+WORKDIR /web
+
+# Install requirements
+RUN ~/.bun/bin/bun install
+
+# Build frontend
+RUN ~/.bun/bin/bun run build
+
+### Build Cup ###
+FROM rust:1.80.1-alpine AS build
+
+# Requirements
 RUN apk add musl-dev
 
-RUN USER=root cargo new --bin cup
+# Copy files
 WORKDIR /cup
 
-COPY Cargo.toml Cargo.lock .
-RUN cargo build --release
-RUN rm -rf src/
+COPY Cargo.toml .
+COPY Cargo.lock .
+COPY ./src ./src
 
-COPY src src
-# This is a very bad workaround, but cargo only triggers a rebuild this way for some reason
-RUN printf "\n" >> src/main.rs
+# Copy UI from web builder
+COPY --from=web /web/dist src/static
+
+# Build
 RUN cargo build --release
 
+### Main ###
 FROM scratch
+
+# Copy binary
 COPY --from=build /cup/target/release/cup /cup
+
 ENTRYPOINT ["/cup"]