Docker + Unbound: Stuck in the middle

Help docker
1

My pi-hole.conf:

# pi-hole.conf
server:
    # Basic log settings
    logfile: "/var/log/unbound/unbound.log"
    log-time-ascii: yes
    verbosity: 1

    interface: 127.0.0.1
    port: 5335

    # DNS settings
    do-ip4: yes
    do-udp: yes
    do-tcp: yes
    do-ip6: yes
    prefer-ip6: no

    # Performance
    edns-buffer-size: 1232
    prefetch: yes
    prefetch-key: yes
    num-threads: 4
    so-rcvbuf: 4m
    so-sndbuf: 4m
    msg-cache-size: 100m
    rrset-cache-size: 200m
    aggressive-nsec: yes
    minimal-responses: yes

    # Security
    harden-glue: yes
    harden-dnssec-stripped: yes
    harden-referral-path: yes
    use-caps-for-id: no
    auto-trust-anchor-file: "/usr/share/dns/root.key"
    qname-minimisation: yes
    hide-identity: yes
    hide-version: yes
    ratelimit: 1000

    # Root hints
    root-hints: "/usr/share/dns/root.hints"

    # Prevent DNS leaks for private ranges
    private-address: 192.168.0.0/16
    private-address: 169.254.0.0/16
    private-address: 172.16.0.0/12
    private-address: 10.0.0.0/8
    private-address: fd00::/8
    private-address: fe80::/10

# Auth-Zone for root hints fallback
auth-zone:
    name: "."
    fallback-enabled: yes
    for-downstream: no
    for-upstream: yes
    zonefile: "/usr/share/dns/root.zone"

# Forward-Zone w/ DNS-over-TLS
# forward-zone:
#     name: "."
#     forward-tls-upstream: yes
#     forward-first: yes
#     forward-addr: 1.1.1.1@853#cloudflare-dns.com
#     forward-addr: 9.9.9.9@853#dns.quad9.net

And using following docker command for downloading those files:

RUN mkdir -p /usr/share/dns \
  && wget -q -O /usr/share/dns/root.hints https://www.internic.net/domain/named.root \
  && wget -q -O /usr/share/dns/root.zone https://www.internic.net/domain/root.zone \
  && unbound-anchor -a /usr/share/dns/root.key

Are my configurations ok?

Getting issues:

Feb 15 13:07:21 unbound[1327:0] error: parse error /usr/share/dns/root.zone 18:54: Syntax error, could not parse the RR's type
Feb 15 13:07:21 unbound[1327:0] error: error parsing zonefile /usr/share/dns/root.zone for .
Feb 15 13:07:21 unbound[1327:0] fatal error: auth_zones could not be setup
2

That isn't related to Pi-hole.

What are you trying to achieve here?
Creating your own unbound Docker image?

Then you should consider to consult Docker's documentation and support for advice on creating an image.

Or custom configuring a pre-build unbound image downloaded from Docker?

Then you should consider to contact the unbound image maintainer for support.