added multi stage builds for oci containers

it should help from builds from failing in addition to slimming down the
artifact size

backend/public/Dockerfile

@@ -1,4 +1,5 @@
-FROM rust:1.88.0
+# Build stage
+FROM rust:1.88.0 AS builder
 
 WORKDIR /app
 
@@ -7,6 +8,16 @@ COPY ./cache ./cache
 
 RUN cargo build --release --manifest-path ./public/Cargo.toml
 
+# Runtime stage with Alpine
+FROM alpine:latest
+
+WORKDIR /app
+
+RUN apk add --no-cache ca-certificates libgcc
+
+COPY --from=builder /app/public/target/release/public /app/public
+COPY --from=builder /app/cache ./cache
+
 EXPOSE 3000
 
-CMD ["/app/public/target/release/public"]
+CMD ["/app/public"]

backend/task/Dockerfile

@@ -1,4 +1,5 @@
-FROM rust:1.88.0
+# Build stage
+FROM rust:1.88.0 AS builder
 
 WORKDIR /app
 
@@ -6,9 +7,23 @@ COPY ./task ./task
 COPY ./cache ./cache
 COPY ./storage ./storage
 
-RUN mkdir /app/posts
 RUN cargo build --release --manifest-path ./task/Cargo.toml
 
+# Runtime stage
+FROM debian:bookworm-slim
+
+WORKDIR /app
+
+RUN apt-get update && apt-get install -y \
+    ca-certificates \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN mkdir /app/posts
+
+COPY --from=builder /app/task/target/release/task /app/task
+COPY --from=builder /app/cache ./cache
+COPY --from=builder /app/storage ./storage
+
 EXPOSE 3000
 
-CMD ["/app/task/target/release/task"]
+CMD ["/app/task"]