Add support for Quay.io and GHCR.io as registries

- Added support for Quay.io
- Added support for GHCR.io

To enable support for these container image registries the following needs to be added.

As `Actions secrets and variables` - `Secrets`
- `DOCKERHUB_TOKEN` and `DOCKERHUB_USERNAME`
- `QUAY_TOKEN` and `QUAY_USERNAME`

As `Actions secrets and variables` - `Variables` - `Repository Variables`
- `DOCKERHUB_REPO`
- `GHCR_REPO`
- `QUAY_REPO`

The `DOCKERHUB_REPO` currently configured in `Secrets` can be removed if wanted, probably best after this PR has been merged.

If one of the vars/secrets are not configured it will skip that specific registry!

hooks/build

@@ -1,7 +1,8 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 echo ">>> Building images..."
 
+# shellcheck source=arches.sh
 source ./hooks/arches.sh
 
 if [[ -z "${SOURCE_COMMIT}" ]]; then
@@ -26,7 +27,7 @@ LABELS=(
     org.opencontainers.image.licenses="AGPL-3.0-only"
     org.opencontainers.image.revision="${SOURCE_COMMIT}"
     org.opencontainers.image.source="${SOURCE_REPOSITORY_URL}"
-    org.opencontainers.image.url="https://hub.docker.com/r/${DOCKER_REPO#*/}"
+    org.opencontainers.image.url="https://github.com/dani-garcia/vaultwarden"
     org.opencontainers.image.version="${SOURCE_VERSION}"
 )
 LABEL_ARGS=()
@@ -45,6 +46,6 @@ for arch in "${arches[@]}"; do
     docker build \
            "${LABEL_ARGS[@]}" \
            -t "${DOCKER_REPO}:${DOCKER_TAG}-${arch}" \
-           -f docker/${arch}/Dockerfile${buildkit_suffix}${distro_suffix} \
+           -f "docker/${arch}/Dockerfile${buildkit_suffix}${distro_suffix}" \
            .
 done