upgrade pip. completed reqs via pip freeze

core/admin/Dockerfile

@@ -35,7 +35,8 @@ COPY requirements-prod.txt requirements.txt
 RUN set -eu \
  && apk add --no-cache libressl curl postgresql-libs mariadb-connector-c \
  && apk add --no-cache --virtual build-dep libressl-dev libffi-dev python3-dev build-base postgresql-dev mariadb-connector-c-dev cargo \
- && pip3 install -r requirements.txt \
+ && pip install --upgrade pip \
+ && pip install -r requirements.txt \
  && apk del --no-cache build-dep
 
 COPY --from=assets static ./mailu/ui/static

core/admin/requirements-prod.txt

@@ -1,14 +1,23 @@
 alembic==1.0.10
+appdirs==1.4.4
 asn1crypto==0.24.0
 Babel==2.6.0
 bcrypt==3.1.6
 blinker==1.4
+CacheControl==0.12.6
+certifi==2020.12.5
 cffi==1.12.3
+chardet==4.0.0
 Click==7.0
+colorama==0.4.4
+contextlib2==0.6.0
 cryptography==3.4.7
 decorator==4.4.0
+distlib==0.3.1
+distro==1.5.0
 dnspython==1.16.0
 dominate==2.3.5
+email-validator==1.1.3
 Flask==1.0.2
 Flask-Babel==0.12.2
 Flask-Bootstrap==3.3.7.1
@@ -21,36 +30,48 @@ Flask-Script==2.0.6
 Flask-SQLAlchemy==2.4.0
 Flask-WTF==0.14.2
 gunicorn==20.1.0
+html5lib==1.1
 idna==2.8
 infinity==1.4
 intervals==0.8.1
 itsdangerous==1.1.0
 Jinja2==2.11.3
 limits==1.3
+lockfile==0.12.2
 Mako==1.0.9
 MarkupSafe==1.1.1
-mysqlclient==1.4.2.post1
 marshmallow==3.10.0
 marshmallow-sqlalchemy==0.24.1
+msgpack==1.0.2
+mysqlclient==1.4.2.post1
+ordered-set==4.0.2
+packaging==20.9
 passlib==1.7.4
+pep517==0.10.0
+progress==1.5
 psycopg2==2.8.2
 pycparser==2.19
 Pygments==2.8.1
 pyOpenSSL==20.0.1
+pyparsing==2.4.7
 python-dateutil==2.8.0
 python-editor==1.0.4
 pytz==2019.1
 PyYAML==5.4.1
 redis==3.2.1
-#alpine3:12 provides six==1.15.0
+requests==2.25.1
-#six==1.12.0
+retrying==1.3.3
+six==1.15.0
 socrate==0.1.1
 SQLAlchemy==1.3.3
 srslib==0.1.4
 tabulate==0.8.3
 tenacity==5.0.4
+toml==0.10.2
+urllib3==1.26.5
 validators==0.12.6
 visitor==0.1.3
+webencodings==0.5.1
 Werkzeug==0.15.5
 WTForms==2.3.3
 WTForms-Components==0.10.5