Fix Dockerfile for parca server

[orgads]

If /data doesn't exist, nobody cannot create it so it fails all the time.

[CLAassistant]

All committers have signed the CLA.

[metalmatze]

In which scenario does this fail? Please elaborate. Thanks!

[orgads]

I'm just running the server as a container, and on each mapping it receives, there's an error.

Server:

docker run --rm -p 7070:7070  ghcr.io/parca-dev/parca:v0.20.0 /parca

Client:

docker run --rm --privileged --pid host ghcr.io/parca-dev/parca-agent:v0.28.0 /bin/parca-agent --node=docker-test --remote-store-address=$ip:7070 --remote-store-insecure

Server side:

level=error ... grpc.error="mark debuginfo upload as uploading via gRPC: write debuginfo metadata to object storage: mkdir /data: permission denied" grpc.time_ms=0.183

Client side:

level=error ... msg="upload mapping" err="failed to ensure debug information uploaded: initiate upload: rpc error: code = Unknown desc = mark debuginfo upload as uploading via gRPC: write debuginfo metadata to object storage: mkdir /data: permission denied" buildid=9042a6de34394719252c50aed79cdbabdff902a9 filepath=/proc/13207/root/usr/lib/x86_64-linux-gnu/libldap.so.2.0.200

[metalmatze]

Excellent, thanks for those commands!
I was able to reproduce it. This should be fixed.

[orgads]

The failing test doesn't look related.

[orgads]

Rebased

[orgads]

Rebased