Split README file

Dockerfile_from_scratch

@@ -0,0 +1,53 @@
+################
+##### Builder
+FROM alpine:3.19.1 AS builder
+
+RUN apk update && apk upgrade && apk add binutils build-base ca-certificates curl file g++ gcc make patch fuse3
+
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+
+RUN . ~/.cargo/env && rustup target add x86_64-unknown-linux-musl
+
+RUN . ~/.cargo/env && rustup default nightly && rustup update
+
+# Cache downloaded+built dependencies
+#COPY Cargo.toml Cargo.lock /usr/src/rencfs/
+#RUN mkdir /usr/src/rencfs/src && \
+#    echo 'fn main() {}' > /usr/src/rencfs/src/main.rs
+#
+#RUN . ~/.cargo/env && cd /usr/src/rencfs/ && cargo build --release && \
+#    rm -Rvf /usr/src/rencfs/src
+
+# Build our actual code
+#COPY Cargo.toml Cargo.lock /usr/src/rencfs/
+#COPY src /usr/src/rencfs
+COPY . /usr/src/rencfs
+#COPY examples /usr/src/rencfs/examples
+RUN . ~/.cargo/env &&  \
+    cd /usr/src/rencfs/ &&  \
+    cargo build --target x86_64-unknown-linux-musl --release
+
+#Copy the fusermount3 binary and libraries into a directory
+RUN mkdir /fusermount3dep && \
+    cp $(which fusermount3) /fusermount3dep/ && \
+    ldd $(which fusermount3) | awk '{ print $3 }' | xargs -I {} cp {} /fusermount3dep/
+
+
+################
+##### Runtime
+FROM scratch AS runtime
+
+# Copy fusermount3
+COPY --from=builder /fusermount3dep/fusermount3 /usr/bin/
+
+# Copy busybox
+COPY --from=builder /bin/ /bin/
+
+# Copy ld-musl (fusermount3 & busybox dep)
+COPY --from=builder /fusermount3dep/ld* /lib/
+
+# Copy application binary from builder image
+COPY --from=builder /usr/src/rencfs/target/x86_64-unknown-linux-musl/release/rencfs /usr/bin/
+
+# Run the application
+CMD ["rencfs", "--help"]