add docker build

docker/dot.env.sample.py

@@ -0,0 +1,30 @@
+#!/usr/bin/python3
+import os
+from binascii import hexlify
+import string
+
+chars = string.ascii_letters + string.digits
+
+def pwgen(length=16):
+    return ''.join(chars[c % len(chars)] for c in os.urandom(length))
+
+
+print('''SECRET_KEY={SECRET_KEY}
+
+POSTGRES_USER=pandora
+POSTGRES_PASSWORD={POSTGRES_PASSWORD}
+
+RABBITMQ_DEFAULT_USER=pandora
+RABBITMQ_DEFAULT_PASS={RABBITMQ_PASSWORD}
+
+# required to send out password reset emails
+#EMAIL_HOST='example.com'
+#EMAIL_USER='mail@example.com'
+#EMAIL_PASSWORD='fixme'
+#EMAIL_PORT=587
+#EMAIL_TLS=true
+'''.format(
+    SECRET_KEY=hexlify(os.urandom(64)).decode(),
+    POSTGRES_PASSWORD=pwgen(),
+    RABBITMQ_PASSWORD=pwgen()
+))