feat: Docker exec mode, closes #28

containerised/Dockerfile

@@ -45,18 +45,32 @@ RUN cargo build --release --target $(cat /.platform)
 
 RUN cp /usr/src/oxker/target/$(cat /.platform)/release/oxker /
 
+################
+## MUSL SETUP ##
+################
+
+FROM alpine:3.18 as MUSL_SETUP
+
+RUN apk add --update --no-cache docker-cli upx
+
+# Compress the docker executable, to reduce final image size
+RUN upx -9 /usr/bin/docker
+
 #############
 ## Runtime ##
 #############
 
-FROM scratch AS RUNTIME
+FROM alpine:3.18 as RUNTIME
 
-# Set an ENV that we're running in a container, so that the application can sleep for 250ms at start
+# Set an ENV to indicate that we're running in a container
 ENV OXKER_RUNTIME=container
 
-# Copy application binary from builder image
 COPY --from=BUILDER /oxker /app/
+COPY --from=MUSL_SETUP /usr/bin/docker /usr/bin/
+
+# remove sh and busybox, probably pointless
+RUN rm /bin/sh /bin/busybox
 
 # Run the application
-# this is used in the application itself, to stop itself from listing itself, so DO NOT EDIT
+# this is used in the application itself so DO NOT EDIT
 ENTRYPOINT [ "/app/oxker"]