ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.6/main: temporary error (try again later) WARNING: Ignoring APKINDEX.84815163.tar.gz: No such file or directory

[AlvinaKundhlande]

im trying to build the docker container with this command
docker build -t bc/pspt-issuer:1.0
and im getting this error:
Sending build context to Docker daemon 1.217MB
Step 1/6 : FROM seegno/bitcoind:0.13-alpine
---> 73b9b57b4bd1
Step 2/6 : MAINTAINER Kim Duffy "[email protected]"
---> Using cache
---> 0a8f67744868
Step 3/6 : COPY . /pspt-issuer
---> Using cache
---> 3b786c76d83c
Step 4/6 : COPY conf_regtest.ini /etc/pspt-issuer/conf.ini
---> Using cache
---> 84cd7a19d02c
Step 5/6 : RUN apk add --update libxml2-dev libxslt-dev bash ca-certificates curl gcc gmp-dev libffi-dev libressl-dev linux-headers make musl-dev python python3 python3-dev tar && python3 -m ensurepip && pip3 install --upgrade pip setuptools && mkdir -p /etc/pspt-issuer/data/unsigned_passports && mkdir /etc/pspt-issuer/data/blockchain_passports && mkdir ~/.bitcoin && echo $'rpcuser=foo\nrpcpassword=bar\nrpcport=8332\nregtest=1\nrelaypriority=0\nrpcallowip=127.0.0.1\nrpcconnect=127.0.0.1\n' > /root/.bitcoin/bitcoin.conf && pip3 install /pspt-issuer/. && rm -r /usr/lib/python*/ensurepip && rm -rf /var/cache/apk/* && rm -rf /root/.cache && sed -i.bak s/==1.0b1/>=1.0.2/g /usr/lib/python3./site-packages/merkletools-1.0.2-py3..egg-info/requires.txt
---> Running in a26c88cd1cbc
fetch http://dl-cdn.alpinelinux.org/alpine/v3.6/main/x86_64/APKINDEX.tar.gz
ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.6/main: temporary error (try again later)
WARNING: Ignoring APKINDEX.84815163.tar.gz: No such file or directory
fetch http://dl-cdn.alpinelinux.org/alpine/v3.6/community/x86_64/APKINDEX.tar.gz
ERROR: http://dl-cdn.alpinelinux.org/alpine/v3.6/community: temporary error (try again later)
WARNING: Ignoring APKINDEX.24d64ab1.tar.gz: No such file or directory
ERROR: unsatisfiable constraints:
bash (missing):
required by: world[bash]
ca-certificates (missing):
required by: world[ca-certificates]
curl (missing):
required by: world[curl]
gcc (missing):
required by: world[gcc]
gmp-dev (missing):
required by: world[gmp-dev]
libffi-dev (missing):
required by: world[libffi-dev]
libressl-dev (missing):
required by: world[libressl-dev]
libxml2-dev (missing):
required by: world[libxml2-dev]
libxslt-dev (missing):
required by: world[libxslt-dev]
linux-headers (missing):
required by: world[linux-headers]
make (missing):
required by: world[make]
musl-dev (missing):
required by: world[musl-dev]
python (missing):
required by: world[python]
python3 (missing):
required by: world[python3]
python3-dev (missing):
required by: world[python3-dev]
tar (missing):
required by: world[tar]
The command '/bin/sh -c apk add --update libxml2-dev libxslt-dev bash ca-certificates curl gcc gmp-dev libffi-dev libressl-dev linux-headers make musl-dev python python3 python3-dev tar && python3 -m ensurepip && pip3 install --upgrade pip setuptools && mkdir -p /etc/pspt-issuer/data/unsigned_passports && mkdir /etc/pspt-issuer/data/blockchain_passports && mkdir ~/.bitcoin && echo $'rpcuser=foo\nrpcpassword=bar\nrpcport=8332\nregtest=1\nrelaypriority=0\nrpcallowip=127.0.0.1\nrpcconnect=127.0.0.1\n' > /root/.bitcoin/bitcoin.conf && pip3 install /pspt-issuer/. && rm -r /usr/lib/python*/ensurepip && rm -rf /var/cache/apk/* && rm -rf /root/.cache && sed -i.bak s/==1.0b1/>=1.0.2/g /usr/lib/python3./site-packages/merkletools-1.0.2-py3..egg-info/requires.txt' returned a non-zero code: 16

how can i debug it