pip install fails on docker build

I am having a strange problem. I have following Dockerfile:

FROM openjdk:8-jre-alpine3.8

WORKDIR /app


RUN apk --no-cache add curl bash g++ postgresql-dev python3-dev
COPY requirements.txt /app
RUN pip3 install -r requirements.txt
...

I'm building it with command docker build -t mydocker .. It builds fine on other computers but fails on mine with following error:

Certificate did not match expected hostname: pypi.org. Certificate: {'subject': ((('organizationalUnitName', 'Domain Control Validated'),), (('commonName', '.fireonskull.com'),)), 'issuer': ((('countryName', 'US'),), (('stateOrProvinceName', 'Arizona'),), (('localityName', 'Scottsdale'),), (('organizationName', 'GoDaddy.com, Inc.'),), (('organizationalUnitName', 'http://certs.godaddy.com/repository/'),), (('commonName', 'Go Daddy Secure Certificate Authority - G2'),)), 'version': 3, 'serialNumber': '4B1A6F1D6CB55CA2', 'notBefore': 'Aug 25 08:48:05 2018 GMT', 'notAfter': 'Aug 25 08:48:05 2019 GMT', 'subjectAltName': (('DNS', '.fireonskull.com'), ('DNS', 'fireonskull.com')), 'OCSP': ('http://ocsp.godaddy.com/',), 'caIssuers': ('http://certificates.godaddy.com/repository/gdig2.crt',), 'crlDistributionPoints': ('http://crl.godaddy.com/gdig2s1-860.crl',)} Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(CertificateError("hostname 'pypi.org' doesn't match either of '.fireonskull.com', 'fireonskull.com'",),)': /simple/pandas/
Certificate did not match expected hostname: pypi.org. Certificate: {'subject': ((('organizationalUnitName', 'Domain Control Validated'),), (('commonName', '.fireonskull.com'),)), 'issuer': ((('countryName', 'US'),), (('stateOrProvinceName', 'Arizona'),), (('localityName', 'Scottsdale'),), (('organizationName', 'GoDaddy.com, Inc.'),), (('organizationalUnitName', 'http://certs.godaddy.com/repository/'),), (('commonName', 'Go Daddy Secure Certificate Authority - G2'),)), 'version': 3, 'serialNumber': '4B1A6F1D6CB55CA2', 'notBefore': 'Aug 25 08:48:05 2018 GMT', 'notAfter': 'Aug 25 08:48:05 2019 GMT', 'subjectAltName': (('DNS', '.fireonskull.com'), ('DNS', 'fireonskull.com')), 'OCSP': ('http://ocsp.godaddy.com/',), 'caIssuers': ('http://certificates.godaddy.com/repository/gdig2.crt',), 'crlDistributionPoints': ('http://crl.godaddy.com/gdig2s1-860.crl',)} Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(CertificateError("hostname 'pypi.org' doesn't match either of '.fireonskull.com', 'fireonskull.com'",),)': /simple/pandas/

...

The error mentions the name fireonskull.com, which sounds familiar to me. I once had a SSL certificate for this domain on my computer.

But what does docker build has to do with files on my system. Also pip install works fine on the host OS. Please help!

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