chore: use docker root user (#251)

Dockerfile

@@ -3,10 +3,6 @@ FROM public.ecr.aws/r5b3e0r5/3box/rust-builder:latest as builder
 RUN mkdir -p /home/builder/rust-ceramic
 WORKDIR /home/builder/rust-ceramic
 
-# Use the same ids as the parent docker image by default
-ARG UID=1001
-ARG GID=1001
-
 # Define the type of build to make. One of release or debug.
 ARG BUILD_MODE=release
 
@@ -16,8 +12,8 @@ COPY . .
 # Build application using a docker cache
 # To clear the cache use:
 #   docker builder prune --filter type=exec.cachemount
-RUN --mount=type=cache,target=/home/builder/.cargo,uid=$UID,gid=$GID \
-	--mount=type=cache,target=/home/builder/rust-ceramic/target,uid=$UID,gid=$GID \
+RUN --mount=type=cache,target=/home/builder/.cargo \
+	--mount=type=cache,target=/home/builder/rust-ceramic/target \
     make $BUILD_MODE && \
     cp ./target/release/ceramic-one ./