all: remove curl (#401)
We only have curl for debugging. We can just use wget which comes with
busybox. Additionally bump alpine patch version to latest.
Test Plan: ran wget manually to ensure it works. Also built both images
locally and had clean scans from snyk.
docker build -t zoekt .
docker scan zoekt
docker build -t zoekt-indexserver . -f Dockerfile.indexserver
docker scan zoekt-indexserver
docker build -t zoekt-webserver . -f Dockerfile.webserver
docker scan zoekt-webserver