Added Dockerfile and docker-compose.yml for python 3

Dockerfile

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+FROM ubuntu:20.04
+
+RUN apt-get update
+RUN apt-get install -y python3-venv python3-dev python3-pip python3-wheel
+
+#Create a virtualenv for datapusher
+RUN python3 -m venv /usr/lib/ckan/datapusher
+
+# Create a source directory and copy source files
+RUN mkdir -p /usr/lib/ckan/datapusher/src/datapusher
+ADD . /usr/lib/ckan/datapusher/src/datapusher
+
+# Install the DataPusher and its requirements
+RUN cd /usr/lib/ckan/datapusher/src/datapusher
+RUN /usr/lib/ckan/datapusher/bin/pip install wheel
+RUN /usr/lib/ckan/datapusher/bin/pip install -U 'chardet >= 3.0.2, < 4'
+RUN /usr/lib/ckan/datapusher/bin/pip install requests
+
+#RUN cd /usr/lib/ckan/datapusher/src/datapusher &&  \
+#    /usr/lib/ckan/datapusher/bin/pip install -r requirements.txt && \
+#    /usr/lib/ckan/datapusher/bin/python setup.py develop
+WORKDIR /usr/lib/ckan/datapusher/src/datapusher
+RUN /usr/lib/ckan/datapusher/bin/pip install -r requirements.txt
+RUN /usr/lib/ckan/datapusher/bin/python setup.py develop
+
+# Create a user to run the web service (if necessary)
+RUN addgroup www-data ; exit 0
+RUN adduser www-data www-data ; exit 0
+
+# Install uWSGI
+RUN /usr/lib/ckan/datapusher/bin/pip install uwsgi
+
+# Replace 127.0.0.1 with 0.0.0.0 (to bind to all addresses)
+RUN sed -i "s|127.0.0.1|0.0.0.0|g" /usr/lib/ckan/datapusher/src/datapusher/deployment/datapusher-uwsgi.ini
+
+# EXEC
+CMD ["/usr/lib/ckan/datapusher/bin/uwsgi", "-i", "/usr/lib/ckan/datapusher/src/datapusher/deployment/datapusher-uwsgi.ini"]
+
+EXPOSE 8800
+
+
+
+
+
+
+

docker-compose.yml

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+# docker-compose build && docker-compose up -d
+version: "3"
+
+volumes:
+  datapusher:
+  #datapusher_logs:
+
+services:
+  datapusher:
+    restart: always
+    container_name: datapusher
+    build:
+      context: .
+    ports:
+      - "0.0.0.0:8800:8800"
+    environment:
+      - DATAPUSHER_HOST=0.0.0.0
+      - DATAPUSHER_PORT=8800
+      - DATAPUSHER_SQLALCHEMY_DATABASE_URI=sqlite:////tmp/job_store.db
+      - DATAPUSHER_MAX_CONTENT_LENGTH=1024000
+      - DATAPUSHER_CHUNK_SIZE=16384
+      - DATAPUSHER_CHUNK_INSERT_ROWS=250
+      - DATAPUSHER_DOWNLOAD_TIMEOUT=30
+      - SSL_VERIFY=True
+    volumes:
+      - datapusher:/usr/lib/ckan/datapusher/src
+      #- datapusher_logs:/tmp