Update Dockerfile

Dockerfile

@@ -28,7 +28,7 @@ RUN apk add --no-cache clang lld musl-dev git
 # source code into the container. Once built, copy the executable to an
 # output directory before the cache mounted /app/target is unmounted.
 RUN --mount=type=bind,source=src,target=src \
-    --mount=type=bind,source=plugin-api,target=plugin-api \
+    --mount=type=bind,source=plugin-api,target=plugin-api,readonly=false \
     --mount=type=bind,source=plugins,target=plugins \
     --mount=type=bind,source=config.yml,target=config.yml    \
     --mount=type=bind,source=Cargo.toml,target=Cargo.toml \