Docker support (#8725)

* Moving Docker stuff around

* docker-compose working as expected

* Updating README

* Addressing comments

* Utilizing requirements-extra

docker/docker-init.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+set -ex
+
+# Create an admin user
+echo "Setting up admin user..."
+flask fab create-admin \
+              --username admin \
+              --firstname Superset \
+              --lastname Admin \
+              --email admin@superset.com \
+              --password admin
+
+# Initialize the database
+echo "Migrating the DB..."
+superset db upgrade
+
+if [ "$SUPERSET_LOAD_EXAMPLES" = "yes" ]; then
+    # Load some data to play with
+    superset load_examples
+fi
+
+# Create default roles and permissions
+echo "Setting up roles and perms..."
+superset init