Fix Docker build and restore ubuntu 24.04 as base Docker image

Ubuntu version changed on suspicion of Ghostscript 10, but that issue is resolved.

.docker/Dockerfile.alpine

@@ -29,12 +29,12 @@ COPY . /app
 
 WORKDIR /app
 
-RUN curl -LsSf https://astral.sh/uv/0.5.4/install.sh | sh
+COPY --from=ghcr.io/astral-sh/uv:0.5.5 /uv /uvx /bin/
 
 ENV UV_COMPILE_BYTECODE=1 UV_LINK_MODE=copy
 
 # Instead of restarting the shell, use uv directly from its installed location.
-RUN /root/.cargo/bin/uv sync --extra test --extra webservice --extra watcher
+RUN uv sync --extra test --extra webservice --extra watcher
 
 FROM base